Gyro and Basic Stamp
Archiver
Posts: 46,084
Boy! when you say scratch pad you really mean it !!
dakota wrote:
>
> > here is a link to the scratch pad I used
> >
> > http://www.inetport.com/~davisele/ROSWELL.JPG
> >
> >
> > richard
> >
> >
> >
dakota wrote:
>
> > here is a link to the scratch pad I used
> >
> > http://www.inetport.com/~davisele/ROSWELL.JPG
> >
> >
> > richard
> >
> >
> >
Comments
After days of pain in the the butt, I was finally able to complete my
first minature robot. 1 in wide by 3 in high - not a very complex
behavior at this point though - can sense light, take temp
measurement, avoid obstacles and seek light.
I'd like to know about a gyro. What it is and where can one use it in
the areas of airplanes (probably r/c airplanes).
Please throw in your comments. If you can point me to a web site with
any info - that'll be really great too.
Any help is much appreciated.
thanks
nagi
what is your question?
thanks
richard
Original Message
From: <nags@c...>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 10:05 AM
Subject: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> Hello,
>
> After days of pain in the the butt, I was finally able to complete my
> first minature robot. 1 in wide by 3 in high - not a very complex
> behavior at this point though - can sense light, take temp
> measurement, avoid obstacles and seek light.
>
>
> I'd like to know about a gyro. What it is and where can one use it in
> the areas of airplanes (probably r/c airplanes).
>
> Please throw in your comments. If you can point me to a web site with
> any info - that'll be really great too.
>
> Any help is much appreciated.
>
> thanks
> nagi
>
>
>
>
[noparse][[/noparse]snip]
> I'd like to know about a gyro. What it is and where can one use it in
> the areas of airplanes (probably r/c airplanes).
Hi Nagi ...
Gyros are most often used with model helicopters to assist in
maintaining a constant heading. They are connected between the
receiver and the servo controlling the tail rotor. The gyro
normally passes unchanged the pulse train from the receiver to
the servo, but if it senses an uncommanded heading change it
modifies the pulse train to bring the 'copter back to its
original heading. Its sensitivity is adjustable to prevent
"hunting". Typical cost is in the US$100 range.
I haven't tried using one on a robot, but if you use a servo
to control direction (as in an R/C car or boat) or a servo type
pulse train to otherwise control direction a gyro would probably
be a big help in maintaining direction after hitting a bump or
while traversing rough terrain.
Have fun,
-Nick
Nick,
Thanks for your comments and insight.
Hi Rich,
I'd like to build an autonomous flying machine - not necessarily an airplane or a copter. But, something that has four 6V motors mounted on the four corners of an "X" beam. Using BS-II, I'd like to have it hover around the house about a feet under the celing (possibly using some IR sensors) and avoid obstacles. I know I'm hoping for too much here with my limited knowledge in electronics and very strong programming skills.
I do understand that I may need to use a gyro. But, how will I use one (or a few) in this application ? I do not know. Experts like you may have better ideas on this.
I guess my question(s) is, how will I use gyro in this above application, and how will I be able to interact with the gyro with my BS-II. Any examples of harware and code related to BS-II and gyro will be a help that I will never forget in my lifetime [noparse]:)[/noparse]
thx guys
nagi
Original Message
From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
Sent: Tuesday, September 26, 2000 10:40 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
I know a fair amount about r/c and gyros
what is your question?
thanks
richard
Original Message
From: <nags@crosscity.com>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 10:05 AM
Subject: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> Hello,
>
> After days of pain in the the butt, I was finally able to complete my
> first minature robot. 1 in wide by 3 in high - not a very complex
> behavior at this point though - can sense light, take temp
> measurement, avoid obstacles and seek light.
>
>
> I'd like to know about a gyro. What it is and where can one use it in
> the areas of airplanes (probably r/c airplanes).
>
> Please throw in your comments. If you can point me to a web site with
> any info - that'll be really great too.
>
> Any help is much appreciated.
>
> thanks
> nagi
>
>
>
>
tilt/motion sensor (csp). But I have no other info.
Free samples at www.analog.com/ADXL202E
Good luck, and keep us informed, Dan
For the flying X, check out
http://www.draganfly.com/products_4key.html
http://www.draganfly.com/products_4eh.html
Seems a bit expensive, but it does already fly.
Original Message
From: Babu, Nagi -*Contractor
To: 'basicstamps@egroups.com'
Sent: Tuesday, September 26, 2000 11:15 AM
Subject: RE: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
Nick,
Thanks for your comments and insight.
Hi Rich,
I'd like to build an autonomous flying machine - not necessarily an airplane or a copter. But, something that has four 6V motors mounted on the four corners of an "X" beam. Using BS-II, I'd like to have it hover around the house about a feet under the celing (possibly using some IR sensors) and avoid obstacles. I know I'm hoping for too much here with my limited knowledge in electronics and very strong programming skills.
I do understand that I may need to use a gyro. But, how will I use one (or a few) in this application ? I do not know. Experts like you may have better ideas on this.
I guess my question(s) is, how will I use gyro in this above application, and how will I be able to interact with the gyro with my BS-II. Any examples of harware and code related to BS-II and gyro will be a help that I will never forget in my lifetime [noparse]:)[/noparse]
thx guys
nagi
Original Message
From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
Sent: Tuesday, September 26, 2000 10:40 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
I know a fair amount about r/c and gyros
what is your question?
thanks
richard
Original Message
From: <nags@crosscity.com>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 10:05 AM
Subject: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> Hello,
>
> After days of pain in the the butt, I was finally able to complete my
> first minature robot. 1 in wide by 3 in high - not a very complex
> behavior at this point though - can sense light, take temp
> measurement, avoid obstacles and seek light.
>
>
> I'd like to know about a gyro. What it is and where can one use it in
> the areas of airplanes (probably r/c airplanes).
>
> Please throw in your comments. If you can point me to a web site with
> any info - that'll be really great too.
>
> Any help is much appreciated.
>
> thanks
> nagi
>
>
>
>
different chip than the stamp itself - but the stamp would talk to the pwm
and give it a string of commands like
fan #1 run 50%
fan # 2 run 50%
fan #3 run 55%
fan $4 run 55%
then repeat
this is a serial servo controller
the stamp would output a serial string of commands to make the engines run
at specified speed
the gyro normally takes a signal from a rx on the way to a servo which is
also a pwm signal and modifies it to correct for tilt
for example 1 ms pulse train drives servo fully ccw and 1 ms pulse train
drives fully cw
1,5 ms pulse train centers the servo
if the gyro is not tilted then it would let the pulse train go through
unchanged - if the gyro is tilted say 3 degrees then the gyro changes the
1.5 ms pulse train to say 1.45 ms or to 1.55 ms - whatever it takes to drive
the machine and also the servo back to level.
- use a device that is a speed controller for electric motors based on servo
pulse train commands - bad news is that they cost about 20-30 dollars each
A r/c radio receiver would need to be hooked up to the gyros to make them
work and to pass controls into the machine (fly by r/c control)
If this thing is fully autonomous then need to hook up a 1.5 ms ttl
oscillator to signal input on the gyros to make them believe they are still
hooked up to a system (or use different gyros - bound to be single chip
silicon gyro by now right?)
the machine would establish its own baseline via the gyros - the decision to
fly forward would be made telling the fore motor to slow down slightly and
speed up the aft motor in some manner that the total thrust does not change
for example using a 8 bit word:
to hover tell all motors to go to decimal 127
to go forward tell front motor to go to speed 119 and rear motor to go to
speed 135( for example)
to land - stop all motion (don't know how to sense that right now) - then
bring all motors to 110 (for example - stop all of them and drop like a
rock) hopefully adjust motor speeds to descend at 6 inches per second
my suggestion is to rig the thing up for initial r/c control and then find
out what are reasonable values for take off, forward flight, landing etc.
that way you could set up some limits for what controls the stamp issues to
the speed controllers
battery voltage drop would also need to accounted for (I believe) either
that or use a regulator between the battery and the speed controller.
this seems like a very ambitious project - keep me posted - I might want to
build one. (I would still like to build the r/c only project - still a fair
amount of work there - but you don't have to write the flight control
software)
I think about this some more - later
richard
Original Message
From: "David Peterson" <robodave1@h...>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 2:07 PM
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
RE: [noparse][[/noparse]basicstamps] Gyro and Basic StampFor the flying X, check out
http://www.draganfly.com/products_4key.html
http://www.draganfly.com/products_4eh.html
Seems a bit expensive, but it does already fly.
Original Message
From: Babu, Nagi -*Contractor
To: 'basicstamps@egroups.com'
Sent: Tuesday, September 26, 2000 11:15 AM
Subject: RE: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
Nick,
Thanks for your comments and insight.
Hi Rich,
I'd like to build an autonomous flying machine - not necessarily an
airplane or a copter. But, something that has four 6V motors mounted on the
four corners of an "X" beam. Using BS-II, I'd like to have it hover around
the house about a feet under the celing (possibly using some IR sensors) and
avoid obstacles. I know I'm hoping for too much here with my limited
knowledge in electronics and very strong programming skills.
I do understand that I may need to use a gyro. But, how will I use one (or
a few) in this application ? I do not know. Experts like you may have better
ideas on this.
I guess my question(s) is, how will I use gyro in this above application,
and how will I be able to interact with the gyro with my BS-II. Any examples
of harware and code related to BS-II and gyro will be a help that I will
never forget in my lifetime [noparse]:)[/noparse]
thx guys
nagi
Original Message
From: dakota [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=I6iRa0hUrB-3j7WCevm1EEWePtD1XaWu0W8-tdVS5mXpXx9i8-AN2H8uGXra5bHV9uvW_JQMrmeO8GtTdn-SXjHy]rfriedrich@i...[/url
Sent: Tuesday, September 26, 2000 10:40 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
I know a fair amount about r/c and gyros
what is your question?
thanks
richard
Original Message
From: <nags@c...>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 10:05 AM
Subject: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> Hello,
>
> After days of pain in the the butt, I was finally able to complete my
> first minature robot. 1 in wide by 3 in high - not a very complex
> behavior at this point though - can sense light, take temp
> measurement, avoid obstacles and seek light.
>
>
> I'd like to know about a gyro. What it is and where can one use it in
> the areas of airplanes (probably r/c airplanes).
>
> Please throw in your comments. If you can point me to a web site with
> any info - that'll be really great too.
>
> Any help is much appreciated.
>
> thanks
> nagi
>
>
>
>
Thanks Rich. I shall keep you guys posted - not sure if I'll be successful - but, I'll know that I tried.
thanks again for the input.
One last thing - is there a "micro gyro" that one can buy from some place ?
nagi
Original Message
From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
Sent: Tuesday, September 26, 2000 3:05 PM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
I believe that you would have 4 pwm to control each fan - this is a
different chip than the stamp itself - but the stamp would talk to the pwm
and give it a string of commands like
fan #1 run 50%
fan # 2 run 50%
fan #3 run 55%
fan $4 run 55%
then repeat
this is a serial servo controller
the· stamp would output a serial string of commands to make the engines run
at specified speed
the gyro normally takes a signal from a rx on the way to a servo which is
also a pwm signal and modifies it to correct for tilt
for example 1 ms pulse train drives servo fully ccw and 1 ms pulse train
drives fully cw
1,5 ms pulse train centers the servo
if the gyro is not tilted then it would let the pulse train go through
unchanged - if the gyro is tilted say 3 degrees then the gyro changes the
1.5 ms pulse train to say 1.45 ms or to 1.55 ms - whatever it takes to drive
the machine and also the servo back to level.
- use a device that is a speed controller for electric motors based on servo
pulse train commands - bad news is that they cost about 20-30 dollars each
A r/c radio receiver would need to be hooked up to the gyros to make them
work and to pass controls into the machine (fly by r/c control)
If this thing is fully autonomous then need to hook up a 1.5 ms· ttl
oscillator to signal input on the gyros to make them believe they are still
hooked up to a system (or use different gyros - bound to be single chip
silicon gyro by now right?)
the machine would establish its own baseline via the gyros - the decision to
fly forward would be made telling the fore motor to slow down slightly and
speed up the aft motor in some manner that the total thrust does not change
for example using a 8 bit word:
to hover tell all motors to go to decimal 127
to go forward tell front motor to go to speed 119 and rear motor to go to
speed 135( for example)
to land - stop all motion (don't know how to sense that right now) - then
bring all motors to 110 (for example - stop all of them and drop like a
rock) hopefully adjust motor speeds to descend at 6 inches per second
my suggestion is to rig the thing up for initial r/c control and then find
out what are reasonable values for take off, forward flight, landing etc.
that way you could set up some limits for what controls the stamp issues to
the speed controllers
battery voltage drop would also need to accounted for (I believe) either
that or use a regulator between the battery and the speed controller.
this seems like a very ambitious project - keep me posted - I might want to
build one. (I would still like to build the r/c only project - still a fair
amount of work there - but you don't have to write the flight control
software)
I think about this some more - later
richard
Original Message
From: "David Peterson" <robodave1@home.com>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 2:07 PM
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
RE: [noparse][[/noparse]basicstamps] Gyro and Basic StampFor the flying X, check out
http://www.draganfly.com/products_4key.html
http://www.draganfly.com/products_4eh.html
Seems a bit expensive, but it does already fly.
·
Original Message
· From: Babu, Nagi -*Contractor
· To: 'basicstamps@egroups.com'
· Sent: Tuesday, September 26, 2000 11:15 AM
· Subject: RE: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
· Nick,
· Thanks for your comments and insight.
· Hi Rich,
· I'd like to build an autonomous flying machine - not necessarily an
airplane or a copter. But, something that has four 6V motors mounted on the
four corners of an "X" beam. Using BS-II, I'd like to have it hover around
the house about a feet under the celing (possibly using some IR sensors) and
avoid obstacles. I know I'm hoping for too much here with my limited
knowledge in electronics and very strong programming skills.
· I do understand that I may need to use a gyro. But, how will I use one (or
a few) in this application ? I do not know. Experts like you may have better
ideas on this.
· I guess my question(s) is, how will I use gyro in this above application,
and how will I be able to interact with the gyro with my BS-II. Any examples
of harware and code related to BS-II and gyro will be a help that I will
never forget in my lifetime [noparse]:)[/noparse]
· thx guys
· nagi
·
Original Message
· From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
· Sent: Tuesday, September 26, 2000 10:40 AM
· To: basicstamps@egroups.com
· Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
· I know a fair amount about r/c and gyros
· what is your question?
· thanks
· richard
·
Original Message
· From: <nags@crosscity.com>
· To: <basicstamps@egroups.com>
· Sent: Tuesday, September 26, 2000 10:05 AM
· Subject: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
· > Hello,
· >
· > After days of pain in the the butt, I was finally able to complete my
· > first minature robot. 1 in wide by 3 in high - not a very complex
· > behavior at this point though - can sense light, take temp
· > measurement, avoid obstacles and seek light.
· >
· >
· > I'd like to know about a gyro. What it is and where can one use it in
· > the areas of airplanes (probably r/c airplanes).
· >
· > Please throw in your comments. If you can point me to a web site with
· > any info - that'll be really great too.
· >
· > Any help is much appreciated.
· >
· > thanks
· > nagi
· >
· >
· >
· >
thanks again for the input.
One last thing - is there a "micro gyro" that onecan buy from some place ?
Check atwww.fmadirect.comand tell Fred I sent you <smile>.
Original Message
From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
Sent: Tuesday, September 26, 2000 3:05 PM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
I believe that you would have 4 pwm to control each fan - this is a
different chip than the stamp itself - but the stamp would talk to the pwm
and give it a string of commands like
fan #1 run 50%
fan # 2 run 50%
fan #3 run 55%
fan $4 run 55%
then repeat
this is a serial servo controller
the· stamp would output a serial string of commands to make the engines run
at specified speed
the gyro normally takes a signal from a rx on the way to a servo which is
also a pwm signal and modifies it to correct for tilt
for example 1 ms pulse train drives servo fully ccw and 1 ms pulse train
drives fully cw
1,5 ms pulse train centers the servo
if the gyro is not tilted then it would let the pulse train go through
unchanged - if the gyro is tilted say 3 degrees then the gyro changes the
1.5 ms pulse train to say 1.45 ms or to 1.55 ms - whatever it takes to drive
the machine and also the servo back to level.
- use a device that is a speed controller for electric motors based on servo
pulse train commands - bad news is that they cost about 20-30 dollars each
A r/c radio receiver would need to be hooked up to the gyros to make them
work and to pass controls into the machine (fly by r/c control)
If this thing is fully autonomous then need to hook up a 1.5 ms· ttl
oscillator to signal input on the gyros to make them believe they are still
hooked up to a system (or use different gyros - bound to be single chip
silicon gyro by now right?)
the machine would establish its own baseline via the gyros - the decision to
fly forward would be made telling the fore motor to slow down slightly and
speed up the aft motor in some manner that the total thrust does not change
for example using a 8 bit word:
to hover tell all motors to go to decimal 127
to go forward tell front motor to go to speed 119 and rear motor to go to
speed 135( for example)
to land - stop all motion (don't know how to sense that right now) - then
bring all motors to 110 (for example - stop all of them and drop like a
rock) hopefully adjust motor speeds to descend at 6 inches per second
my suggestion is to rig the thing up for initial r/c control and then find
out what are reasonable values for take off, forward flight, landing etc.
that way you could set up some limits for what controls the stamp issues to
the speed controllers
battery voltage drop would also need to accounted for (I believe) either
that or use a regulator between the battery and the speed controller.
this seems like a very ambitious project - keep me posted - I might want to
build one. (I would still like to build the r/c only project - still a fair
amount of work there - but you don't have to write the flight control
software)
I think about this some more - later
richard
Original Message
From: "David Peterson" <robodave1@home.com>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 2:07 PM
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
RE: [noparse][[/noparse]basicstamps] Gyro and Basic StampFor the flying X, check out
http://www.draganfly.com/products_4key.html
http://www.draganfly.com/products_4eh.html
Seems a bit expensive, but it does already fly.
·
Original Message
· From: Babu, Nagi -*Contractor
· To: 'basicstamps@egroups.com'
· Sent: Tuesday, September 26, 2000 11:15 AM
· Subject: RE: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
· Nick,
· Thanks for your comments and insight.
· Hi Rich,
· I'd like to build an autonomous flying machine - not necessarily an
airplane or a copter. But, something that has four 6V motors mounted on the
four corners of an "X" beam. Using BS-II, I'd like to have it hover around
the house about a feet under the celing (possibly using some IR sensors) and
avoid obstacles. I know I'm hoping for too much here with my limited
knowledge in electronics and very strong programming skills.
· I do understand that I may need to use a gyro. But, how will I use one (or
a few) in this application ? I do not know. Experts like you may have better
ideas on this.
· I guess my question(s) is, how will I use gyro in this above application,
and how will I be able to interact with the gyro with my BS-II. Any examples
of harware and code related to BS-II and gyro will be a help that I will
never forget in my lifetime [noparse]:)[/noparse]
· thx guys
· nagi
·
Original Message
· From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
· Sent: Tuesday, September 26, 2000 10:40 AM
· To: basicstamps@egroups.com
· Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
· I know a fair amount about r/c and gyros
· what is your question?
· thanks
· richard
·
Original Message
· From: <nags@crosscity.com>
· To: <basicstamps@egroups.com>
· Sent: Tuesday, September 26, 2000 10:05 AM
· Subject: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
· > Hello,
· >
· > After days of pain in the the butt, I was finally able to complete my
· > first minature robot. 1 in wide by 3 in high - not a very complex
· > behavior at this point though - can sense light, take temp
· > measurement, avoid obstacles and seek light.
· >
· >
· > I'd like to know about a gyro. What it is and where can one use it in
· > the areas of airplanes (probably r/c airplanes).
· >
· > Please throw in your comments. If you can point me to a web site with
· > any info - that'll be really great too.
· >
· > Any help is much appreciated.
· >
· > thanks
· > nagi
· >
· >
· >
· >
Micro Piezo Gyro
Light weight at 0.57 oz.
Low power consumption (30mA)
Adjustable Gain and Neutral Settings
Extremely reliable with no moving parts
Wide 23° F - 140° F operating tempurature range
http://www.acroname.com/robotics/parts/R40-MX-9100.html
Original Message
From: nags [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=JMQumFtD_eP3gfqUM6Wc5wJ-84lbPWWShUVPnmS6F02w66DLRGnwC0btOE8yZrl7ldKYgDCQUKHhDAH4]nags@c...[/url
Sent: Tuesday, September 26, 2000 1:27 PM
To: 'basicstamps@egroups.com'
Subject: RE: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
Thanks Rich. I shall keep you guys posted - not sure if I'll be successful -
but, I'll know that I tried.
thanks again for the input.
One last thing - is there a "micro gyro" that one can buy from some place ?
nagi
Original Message
From: dakota [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=STMfHgpWYlAKGDGv2XF0WJpZkpFhSt1mHYTfXMhkcUVlR5uC7sc5mGwZVY-KRR5NKpTbr-EMQjM9LU-Dc_iUJA]rfriedrich@i...[/url
Sent: Tuesday, September 26, 2000 3:05 PM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
I believe that you would have 4 pwm to control each fan - this is a
different chip than the stamp itself - but the stamp would talk to the pwm
and give it a string of commands like
fan #1 run 50%
fan # 2 run 50%
fan #3 run 55%
fan $4 run 55%
then repeat
this is a serial servo controller
the stamp would output a serial string of commands to make the engines run
at specified speed
the gyro normally takes a signal from a rx on the way to a servo which is
also a pwm signal and modifies it to correct for tilt
for example 1 ms pulse train drives servo fully ccw and 1 ms pulse train
drives fully cw
1,5 ms pulse train centers the servo
if the gyro is not tilted then it would let the pulse train go through
unchanged - if the gyro is tilted say 3 degrees then the gyro changes the
1.5 ms pulse train to say 1.45 ms or to 1.55 ms - whatever it takes to drive
the machine and also the servo back to level.
- use a device that is a speed controller for electric motors based on servo
pulse train commands - bad news is that they cost about 20-30 dollars each
A r/c radio receiver would need to be hooked up to the gyros to make them
work and to pass controls into the machine (fly by r/c control)
If this thing is fully autonomous then need to hook up a 1.5 ms ttl
oscillator to signal input on the gyros to make them believe they are still
hooked up to a system (or use different gyros - bound to be single chip
silicon gyro by now right?)
the machine would establish its own baseline via the gyros - the decision to
fly forward would be made telling the fore motor to slow down slightly and
speed up the aft motor in some manner that the total thrust does not change
for example using a 8 bit word:
to hover tell all motors to go to decimal 127
to go forward tell front motor to go to speed 119 and rear motor to go to
speed 135( for example)
to land - stop all motion (don't know how to sense that right now) - then
bring all motors to 110 (for example - stop all of them and drop like a
rock) hopefully adjust motor speeds to descend at 6 inches per second
my suggestion is to rig the thing up for initial r/c control and then find
out what are reasonable values for take off, forward flight, landing etc.
that way you could set up some limits for what controls the stamp issues to
the speed controllers
battery voltage drop would also need to accounted for (I believe) either
that or use a regulator between the battery and the speed controller.
this seems like a very ambitious project - keep me posted - I might want to
build one. (I would still like to build the r/c only project - still a fair
amount of work there - but you don't have to write the flight control
software)
I think about this some more - later
richard
Original Message
From: "David Peterson" <robodave1@h...>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 2:07 PM
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
RE: [noparse][[/noparse]basicstamps] Gyro and Basic StampFor the flying X, check out
http://www.draganfly.com/products_4key.html
http://www.draganfly.com/products_4eh.html
Seems a bit expensive, but it does already fly.
Original Message
From: Babu, Nagi -*Contractor
To: 'basicstamps@egroups.com'
Sent: Tuesday, September 26, 2000 11:15 AM
Subject: RE: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
Nick,
Thanks for your comments and insight.
Hi Rich,
I'd like to build an autonomous flying machine - not necessarily an
airplane or a copter. But, something that has four 6V motors mounted on the
four corners of an "X" beam. Using BS-II, I'd like to have it hover around
the house about a feet under the celing (possibly using some IR sensors) and
avoid obstacles. I know I'm hoping for too much here with my limited
knowledge in electronics and very strong programming skills.
I do understand that I may need to use a gyro. But, how will I use one (or
a few) in this application ? I do not know. Experts like you may have better
ideas on this.
I guess my question(s) is, how will I use gyro in this above application,
and how will I be able to interact with the gyro with my BS-II. Any examples
of harware and code related to BS-II and gyro will be a help that I will
never forget in my lifetime [noparse]:)[/noparse]
thx guys
nagi
Original Message
From: dakota [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=STMfHgpWYlAKGDGv2XF0WJpZkpFhSt1mHYTfXMhkcUVlR5uC7sc5mGwZVY-KRR5NKpTbr-EMQjM9LU-Dc_iUJA]rfriedrich@i...[/url
Sent: Tuesday, September 26, 2000 10:40 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
I know a fair amount about r/c and gyros
what is your question?
thanks
richard
Original Message
From: <nags@c...>
To: <basicstamps@egroups.com>
Sent: Tuesday, September 26, 2000 10:05 AM
Subject: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> Hello,
>
> After days of pain in the the butt, I was finally able to complete my
> first minature robot. 1 in wide by 3 in high - not a very complex
> behavior at this point though - can sense light, take temp
> measurement, avoid obstacles and seek light.
>
>
> I'd like to know about a gyro. What it is and where can one use it in
> the areas of airplanes (probably r/c airplanes).
>
> Please throw in your comments. If you can point me to a web site with
> any info - that'll be really great too.
>
> Any help is much appreciated.
>
> thanks
> nagi
>
>
>
>
>
> http://www.inetport.com/~davisele/ROSWELL.JPG
>
>
> richard
>
>
>
For the speed control module, can I use an LM358 as a voltage follower and a digital resistor X9313TP to control the resistance. Basically use DR output as input to VFlwr and the output of VFlwr (pin3) to a motor. Will this work ? I will therefore have four pairs of these guys.
Original Message
From: LarryGaminde [noparse]/noparse][url=mailto:lgaminde@televar.com]mailto:lgaminde@televar.com[/url
Sent: Sunday, September 24, 2000 12:42 PM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
Boy! when you say scratch pad you really mean it !!
dakota wrote:
>
> > here is a link to the scratch pad I used
> >
> > http://www.inetport.com/~davisele/ROSWELL.JPG
> >
> >
> > richard
> >
> >
> >
;-)
richard
Original Message
From: "LarryGaminde" <lgaminde@t...>
To: <basicstamps@egroups.com>
Sent: Sunday, September 24, 2000 12:42 PM
Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> Boy! when you say scratch pad you really mean it !!
>
> dakota wrote:
> >
> > > here is a link to the scratch pad I used
> > >
> > > http://www.inetport.com/~davisele/ROSWELL.JPG
> > >
> > >
> > > richard
> > >
> > >
> > >
>
>
>
Hi Rich,
For the speed control module, can I use an LM358 as a voltage
follower and a digital resistor X9313TP to control the resistance.
Basically use DR output as input to VFlwr and the output of VFlwr
(pin3) to a motor. Will this work ? I will therefore have four pairs
of these guys. Will that be a logical route to take ?
Thanks
nags
--- In basicstamps@egroups.com, nags <nags@c...> wrote:
> For the speed control module, can I use an LM358 as a voltage
follower and a
> digital resistor X9313TP to control the resistance. Basically use
DR output
> as input to VFlwr and the output of VFlwr (pin3) to a motor. Will
this work
> ? I will therefore have four pairs of these guys.
>
>
>
>
Original Message
> From: LarryGaminde [noparse][[/noparse]mailto:lgaminde@t...]
> Sent: Sunday, September 24, 2000 12:42 PM
> To: basicstamps@egroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
>
>
> Boy! when you say scratch pad you really mean it !!
>
> dakota wrote:
> >
> > > here is a link to the scratch pad I used
> > >
> > > http://www.inetport.com/~davisele/ROSWELL.JPG
> > >
> > >
> > > richard
> > >
> > >
> > >
I suggest the speed controller and serial servo controller because I didnt
want to write code for servicing the 4 outputs every 20 ms or whatever
but if you are going to do the hardware from the ground up - have at it.
richard
Original Message
From: <nags@c...>
To: <basicstamps@egroups.com>
Sent: Wednesday, September 27, 2000 10:29 AM
Subject: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
> Reposting:
>
>
> Hi Rich,
>
> For the speed control module, can I use an LM358 as a voltage
> follower and a digital resistor X9313TP to control the resistance.
> Basically use DR output as input to VFlwr and the output of VFlwr
> (pin3) to a motor. Will this work ? I will therefore have four pairs
> of these guys. Will that be a logical route to take ?
>
> Thanks
> nags
>
>
>
>
>
>
> --- In basicstamps@egroups.com, nags <nags@c...> wrote:
> > For the speed control module, can I use an LM358 as a voltage
> follower and a
> > digital resistor X9313TP to control the resistance. Basically use
> DR output
> > as input to VFlwr and the output of VFlwr (pin3) to a motor. Will
> this work
> > ? I will therefore have four pairs of these guys.
> >
> >
> >
> >
Original Message
> > From: LarryGaminde [noparse][[/noparse]mailto:lgaminde@t...]
> > Sent: Sunday, September 24, 2000 12:42 PM
> > To: basicstamps@egroups.com
> > Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> >
> >
> > Boy! when you say scratch pad you really mean it !!
> >
> > dakota wrote:
> > >
> > > > here is a link to the scratch pad I used
> > > >
> > > > http://www.inetport.com/~davisele/ROSWELL.JPG
> > > >
> > > >
> > > > richard
> > > >
> > > >
> > > >
>
>
>
>
How does the IR511 work. I tried looking for more info on the web, but, could not find any. Is there a data sheet for this baby ?
thx
Original Message
From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
Sent: Wednesday, September 27, 2000 11:10 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
how about power mosfet IR511 family ?
I suggest the speed controller and serial servo controller because I didnt
want to write code for servicing the· 4 outputs every 20 ms or whatever
but if you are going to do the hardware from the ground up - have at it.
richard
Original Message
From: <nags@crosscity.com>
To: <basicstamps@egroups.com>
Sent: Wednesday, September 27, 2000 10:29 AM
Subject: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
> Reposting:
>
>
> Hi Rich,
>
> For the speed control module, can I use an LM358 as a voltage
> follower and a digital resistor X9313TP to control the resistance.
> Basically use DR output as input to VFlwr and the output of VFlwr
> (pin3) to a motor. Will this work ? I will therefore have four pairs
> of these guys. Will that be a logical route to take ?
>
> Thanks
> nags
>
>
>
>
>
>
> --- In basicstamps@egroups.com, nags <nags@c...> wrote:
> > For the speed control module, can I use an LM358 as a voltage
> follower and a
> > digital resistor X9313TP to control the resistance. Basically use
> DR output
> > as input to VFlwr and the output of VFlwr (pin3) to a motor. Will
> this work
> > ? I will therefore have four pairs of these guys.
> >
> >
> >
> >
Original Message
> > From: LarryGaminde [noparse][[/noparse][url=mailto:lgaminde@t]mailto:lgaminde@t[/url]...]
> > Sent: Sunday, September 24, 2000 12:42 PM
> > To: basicstamps@egroups.com
> > Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> >
> >
> > Boy! when you say scratch pad you really mean it !!
> >
> > dakota wrote:
> > >
> > > > here is a link to the scratch pad I used
> > > >
> > > > http://www.inetport.com/~davisele/ROSWELL.JPG
> > > >
> > > >
> > > > richard
> > > >
> > > >
> > > >
>
>
>
>
Reposting :
How does the IR511 work? I tried looking for more info on the web, but, could not find any. Is there a data sheet for this baby ?
thx··
nagi
·
Original Message
From: Babu, Nagi -*Contractor [noparse][[/noparse]mailto:nags@crosscity.com]
Sent: Thursday, September 28, 2000 12:10 PM
To: 'basicstamps@egroups.com'
Subject: RE: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
thx
Original Message
From: dakota [noparse]/noparse][url=mailto:rfriedrich@ispchannel.com]mailto:rfriedrich@ispchannel.com[/url
Sent: Wednesday, September 27, 2000 11:10 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
how about power mosfet IR511 family ?
I suggest the speed controller and serial servo controller because I didnt
want to write code for servicing the· 4 outputs every 20 ms or whatever
but if you are going to do the hardware from the ground up - have at it.
richard
Original Message
From: <nags@crosscity.com>
To: <basicstamps@egroups.com>
Sent: Wednesday, September 27, 2000 10:29 AM
Subject: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
> Reposting:
>
>
> Hi Rich,
>
> For the speed control module, can I use an LM358 as a voltage
> follower and a digital resistor X9313TP to control the resistance.
> Basically use DR output as input to VFlwr and the output of VFlwr
> (pin3) to a motor. Will this work ? I will therefore have four pairs
> of these guys. Will that be a logical route to take ?
>
> Thanks
> nags
>
>
>
>
>
>
> --- In basicstamps@egroups.com, nags <nags@c...> wrote:
> > For the speed control module, can I use an LM358 as a voltage
> follower and a
> > digital resistor X9313TP to control the resistance. Basically use
> DR output
> > as input to VFlwr and the output of VFlwr (pin3) to a motor. Will
> this work
> > ? I will therefore have four pairs of these guys.
> >
> >
> >
> >
Original Message
> > From: LarryGaminde [noparse][[/noparse][url=mailto:lgaminde@t]mailto:lgaminde@t[/url]...]
> > Sent: Sunday, September 24, 2000 12:42 PM
> > To: basicstamps@egroups.com
> > Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> >
> >
> > Boy! when you say scratch pad you really mean it !!
> >
> > dakota wrote:
> > >
> > > > here is a link to the scratch pad I used
> > > >
> > > > http://www.inetport.com/~davisele/ROSWELL.JPG
> > > >
> > > >
> > > > richard
> > > >
> > > >
> > > >
>
>
>
>
richard
Original Message
From: "Babu, Nagi -*Contractor" <nags@c...>
To: <basicstamps@egroups.com>
Sent: Friday, September 29, 2000 11:42 AM
Subject: RE: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
> Reposting :
>
> How does the IR511 work? I tried looking for more info on the web, but,
> could not find any. Is there a data sheet for this baby ?
>
> thx
>
> nagi
>
>
>
>
>
>
>
>
Original Message
> From: Babu, Nagi -*Contractor [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=BFWCxNGXZccMWbLeDv1-fq16Y6uGCU5gpDqYEyJLfrRZ9IbtLV535Gh3V9gJMHFz1l5RxNL1uPFklvSX]nags@c...[/url
> Sent: Thursday, September 28, 2000 12:10 PM
> To: 'basicstamps@egroups.com'
> Subject: RE: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
>
>
>
> How does the IR511 work. I tried looking for more info on the web, but,
> could not find any. Is there a data sheet for this baby ?
>
> thx
>
>
>
Original Message
> From: dakota [noparse][[/noparse] mailto:rfriedrich@i...
> <mailto:rfriedrich@i...> ]
> Sent: Wednesday, September 27, 2000 11:10 AM
> To: basicstamps@egroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
>
>
> how about power mosfet IR511 family ?
>
> I suggest the speed controller and serial servo controller because I didnt
> want to write code for servicing the 4 outputs every 20 ms or whatever
>
> but if you are going to do the hardware from the ground up - have at it.
>
>
> richard
>
>
>
>
>
Original Message
> From: <nags@c...>
> To: <basicstamps@egroups.com>
> Sent: Wednesday, September 27, 2000 10:29 AM
> Subject: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
>
>
> > Reposting:
> >
> >
> > Hi Rich,
> >
> > For the speed control module, can I use an LM358 as a voltage
> > follower and a digital resistor X9313TP to control the resistance.
> > Basically use DR output as input to VFlwr and the output of VFlwr
> > (pin3) to a motor. Will this work ? I will therefore have four pairs
> > of these guys. Will that be a logical route to take ?
> >
> > Thanks
> > nags
> >
> >
> >
> >
> >
> >
> > --- In basicstamps@egroups.com, nags <nags@c...> wrote:
> > > For the speed control module, can I use an LM358 as a voltage
> > follower and a
> > > digital resistor X9313TP to control the resistance. Basically use
> > DR output
> > > as input to VFlwr and the output of VFlwr (pin3) to a motor. Will
> > this work
> > > ? I will therefore have four pairs of these guys.
> > >
> > >
> > >
> > >
Original Message
> > > From: LarryGaminde [noparse][[/noparse] mailto:lgaminde@t <mailto:lgaminde@t> ...]
> > > Sent: Sunday, September 24, 2000 12:42 PM
> > > To: basicstamps@egroups.com
> > > Subject: Re: [noparse][[/noparse]basicstamps] Gyro and Basic Stamp
> > >
> > >
> > > Boy! when you say scratch pad you really mean it !!
> > >
> > > dakota wrote:
> > > >
> > > > > here is a link to the scratch pad I used
> > > > >
> > > > > http://www.inetport.com/~davisele/ROSWELL.JPG
> <http://www.inetport.com/~davisele/ROSWELL.JPG>
> > > > >
> > > > >
> > > > > richard
> > > > >
> > > > >
> > > > >
> >
> >
> >
> >
>
>
>
You are probably referring to an IRF511 mosfet. Their site is
http://www.irf.com.
I went there and they designate the IRF511 as not recommended, and suggest
IRF510. www.digikey.com has an online catalog with IRF mosfets listed on
page 260. I have used logic level IRL530 N-channel devices since they can
be driven directly from a Stamp through a resistor. 100 volt, 15 amp, 0.11
ohm on-resistance.
Ray McArthur
Original Message
From: Babu, Nagi -*Contractor <nags@c...>
To: <basicstamps@egroups.com>
Sent: Friday, September 29, 2000 12:42 PM
Subject: RE: [noparse][[/noparse]basicstamps] Re: Gyro and Basic Stamp
> Reposting :
>
> How does the IR511 work? I tried looking for more info on the web, but,
> could not find any. Is there a data sheet for this baby ?