The use of gyros with basic stamp and robotics
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Posts: 46,084
>One question I have to get started is what is the best way to
>interface the Stamp with 4 digit LED or LCD with minimum stamp
>overhead and circuitry.
You can easily make your own module. This one:
http://www.lennard.net.nz/electronics/led.html
uses 7 lines total for 5 digits.
If you were to replace the 4094's with I2C PCF8574A's, you'd only need 2
lines.
--
http://www.lennard.net.nz/
Ben Lennard, NCEE, Dip EE
Electronics R&D
Hm: +64 4 972 7567
Mb: +64 21 536 627
87 Spencer Street
Crofton Downs
Wellington
New Zealand
"To the optimist, the glass is half full. To the pessimist, the glass is
half empty. To the engineer, the glass is twice as big as it needs to be."
No animals were harmed in the transmission of this email, although the
Dog next door is living on borrowed time, let me tell you! Those of you
with an overwhelming fear of the unknown will be gratified to learn that
there is no hidden message revealed by reading this warning backwards.
> From: "Earl Bollinger" <earlwbollinger@a...>
> Reply-To: basicstamps@yahoogroups.com
> Date: Sat, 2 Nov 2002 07:42:26 -0600
> To: <basicstamps@yahoogroups.com>
> Subject: RE: [noparse][[/noparse]basicstamps] The use of gyros with basic stamp and robotics
>
> One question I have to get started is what is the best way to
> interface the Stamp with 4 digit LED or LCD with minimum stamp
> overhead and circuitry. Circuit Cellar indicated something that was
> discontinued, what is currently available? My gyrocompass analog
> design included 4 parallel BCD to 7 segment drivers but that takes a
> lot of wiring, is there not a IC or module available that would take
> a serial input direct from the stamp?
>interface the Stamp with 4 digit LED or LCD with minimum stamp
>overhead and circuitry.
You can easily make your own module. This one:
http://www.lennard.net.nz/electronics/led.html
uses 7 lines total for 5 digits.
If you were to replace the 4094's with I2C PCF8574A's, you'd only need 2
lines.
--
http://www.lennard.net.nz/
Ben Lennard, NCEE, Dip EE
Electronics R&D
Hm: +64 4 972 7567
Mb: +64 21 536 627
87 Spencer Street
Crofton Downs
Wellington
New Zealand
"To the optimist, the glass is half full. To the pessimist, the glass is
half empty. To the engineer, the glass is twice as big as it needs to be."
No animals were harmed in the transmission of this email, although the
Dog next door is living on borrowed time, let me tell you! Those of you
with an overwhelming fear of the unknown will be gratified to learn that
there is no hidden message revealed by reading this warning backwards.
> From: "Earl Bollinger" <earlwbollinger@a...>
> Reply-To: basicstamps@yahoogroups.com
> Date: Sat, 2 Nov 2002 07:42:26 -0600
> To: <basicstamps@yahoogroups.com>
> Subject: RE: [noparse][[/noparse]basicstamps] The use of gyros with basic stamp and robotics
>
> One question I have to get started is what is the best way to
> interface the Stamp with 4 digit LED or LCD with minimum stamp
> overhead and circuitry. Circuit Cellar indicated something that was
> discontinued, what is currently available? My gyrocompass analog
> design included 4 parallel BCD to 7 segment drivers but that takes a
> lot of wiring, is there not a IC or module available that would take
> a serial input direct from the stamp?
Comments
stamp robot kit I bought many months ago. This was done primarily to
learn to interface the basic stamp with the A to D converter ASIC
(otherwise Pointer ASIC) that is used with the relatively low cost
MG100 gyro made by Gyration, Inc. As an engineer working for
Gyration, I often get asked by purchasers of our gyro to help with
firmware support for basic stamp and other micros. However, my
expertise is in the gyro characteristics and related electronics,
having worked for many decades with inertial instrument testing and
test equipment in aerospace, but have little current firmware
experience. I know a few users have successfully controlled our
gyro/pointer ASIC (Pointer ASIC as it is used in the Gyration mouse
products such as GyroMouse and the new Ultra Optical Cordless, I
can't use the term gyro ASIC because that refers to the totally
analog ASIC integrated within the gyro) using a basic stamp, but then
others have indicated some difficulty and need more direct help than
I have been able to give. I have been offered copies of working
Pointer ASIC control code but have yet received any, but will soon
expect to be a resource for such. My first project effort is a
digital gyrocompass. I have made an analog design (op amp
integrating the rate gyro output feeding up/down counter, then
driving LCD) but digital is needed to provide automatic measure and
storage of gyro output offset for better accuracy. Later, I plan to
integrate a gyro with the basic stamp robot and could help others do
so. Gyration has a very low cost way for students to obtain gyros
for official student projects, but try to discurage me from providing
much help as it would be a big overload on my time. I need to
develop some specific firmware examples and make them available.
One question I have to get started is what is the best way to
interface the Stamp with 4 digit LED or LCD with minimum stamp
overhead and circuitry. Circuit Cellar indicated something that was
discontinued, what is currently available? My gyrocompass analog
design included 4 parallel BCD to 7 segment drivers but that takes a
lot of wiring, is there not a IC or module available that would take
a serial input direct from the stamp?
one of the serial LCD displays that are found in a number of places (like
www.kronosrobotics.com or other sources). One way is to use a separate
dedicated MCU to control the LED's and send it the command or data to
display via a serial port (TTL not RS232). You can also use one of the
Seimens serial LED devices as well (Infineon Seimens SCD5580 eight char LED
smart display). This is a pretty neat unit, 8 alphanumeric characters, uses
only one I/O pin and TTL serial to communicate with. I did a while back made
up a small dedicated MCU to control a 4 digit LED display like the DL1414 or
TIL311, as I wanted a really small LED display that could be controlled
serially. I have this unit up on a small robot of mine I use the the
www.DPRG.org contests. But you have to watch out for the TIL311's as some of
them only do 0-9 and A-F characters only).
Original Message
From: dmcmurrin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=XOSiInzR8DvZ8Q2sm6OwRLSWzUG0jNhC6GoFNjFC3SV1tX8v87FZ0VdIa3bsb6e9FJ2XtPvF81e8WueO1g]dmcmurrin@g...[/url
Sent: Friday, November 01, 2002 10:01 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] The use of gyros with basic stamp and robotics
I have joined this group with the intent to spur my use of the basic
stamp robot kit I bought many months ago. This was done primarily to
learn to interface the basic stamp with the A to D converter ASIC
(otherwise Pointer ASIC) that is used with the relatively low cost
MG100 gyro made by Gyration, Inc. As an engineer working for
Gyration, I often get asked by purchasers of our gyro to help with
firmware support for basic stamp and other micros. However, my
expertise is in the gyro characteristics and related electronics,
having worked for many decades with inertial instrument testing and
test equipment in aerospace, but have little current firmware
experience. I know a few users have successfully controlled our
gyro/pointer ASIC (Pointer ASIC as it is used in the Gyration mouse
products such as GyroMouse and the new Ultra Optical Cordless, I
can't use the term gyro ASIC because that refers to the totally
analog ASIC integrated within the gyro) using a basic stamp, but then
others have indicated some difficulty and need more direct help than
I have been able to give. I have been offered copies of working
Pointer ASIC control code but have yet received any, but will soon
expect to be a resource for such. My first project effort is a
digital gyrocompass. I have made an analog design (op amp
integrating the rate gyro output feeding up/down counter, then
driving LCD) but digital is needed to provide automatic measure and
storage of gyro output offset for better accuracy. Later, I plan to
integrate a gyro with the basic stamp robot and could help others do
so. Gyration has a very low cost way for students to obtain gyros
for official student projects, but try to discurage me from providing
much help as it would be a big overload on my time. I need to
develop some specific firmware examples and make them available.
One question I have to get started is what is the best way to
interface the Stamp with 4 digit LED or LCD with minimum stamp
overhead and circuitry. Circuit Cellar indicated something that was
discontinued, what is currently available? My gyrocompass analog
design included 4 parallel BCD to 7 segment drivers but that takes a
lot of wiring, is there not a IC or module available that would take
a serial input direct from the stamp?
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> interface the Stamp with 4 digit LED or LCD with minimum stamp
> overhead and circuitry.
Have a look at the Econo-LCD Serial LCD module. It can hande
2x16, 2x20, 2x40 and 4x20 LCD panels (many of which can be
found surplus or can be pulled from old equipment). With a serial
interface, you only need 1 I/O line and a simpler SEROUT
command.
http://www.hvwtech.com/pages/products_view.asp?ProductID=109
Mark Hillier, VE6HVW
President, HVW Technologies Inc.
Canadian Distributors of Parallax Products and other Neat Stuff
Tel: (403)-730-8603 Fax: (403)-730-8903
See our NEW FPGA Experimenter Board
http://www.hvwtech.com/intro-fpga.htm