BOE Bot troubles
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I have a BOE bot that has a reset problem. During servo usage, the
stamp resets. Doesn't matter how new the batteries are if I run the
servo's backwards, then try to cange direction, the stamp resets. If
I attach ad lcd, the stamp resets every tim the servos try to move.
Is the stamp on the BOE powered from the BOE voltage regulator, or
from the stamps own voltage regulator?
Thanks
Ben
stamp resets. Doesn't matter how new the batteries are if I run the
servo's backwards, then try to cange direction, the stamp resets. If
I attach ad lcd, the stamp resets every tim the servos try to move.
Is the stamp on the BOE powered from the BOE voltage regulator, or
from the stamps own voltage regulator?
Thanks
Ben
Comments
devises (in your case, a servo). This can cause quite a drain on the
power supply causing the stamp to reset. Couple of things you need
to check out. Don't worry about powering the stamp, the BOE is
prewired for that task. Worry about how the servos are wired. Make
sure that your servos are connected with the red to the Vin (for
power) and black for the Vss (for ground). The white obviously goes
to the pin that you want to assign it to. Next, worry about how you
are going to smooth out the drain in power that will occur each time
you start up the servos. A large 3300uF capacitor should help here.
wire it with the positive lead to Vdd and the negative to Vss. let
me know if you still have problems.
--- In basicstamps@egroups.com, Ben Brown <ben@h...> wrote:
> I have a BOE bot that has a reset problem. During servo usage, the
> stamp resets. Doesn't matter how new the batteries are if I run
the
> servo's backwards, then try to cange direction, the stamp resets.
If
> I attach ad lcd, the stamp resets every tim the servos try to move.
>
> Is the stamp on the BOE powered from the BOE voltage regulator, or
> from the stamps own voltage regulator?
>
> Thanks
> Ben
I added an extra set of batteries, and this helped a little, but I
would still get resets areter 30 seconds or so. So I added a few
pauses directly before and after any direction change. This seems to
give the cap a chance to catch up with the rest of the pieces. Now,
I'm only worried about feeding in too much juice. I am also
concerned that all of these extra steps are involved. I think I will
check the regulator when I get home.
Do you know the ratings on the BOE voltage regulator?
>The BOE design uses a single power supply for both stamp and other
>devises (in your case, a servo). This can cause quite a drain on the
>power supply causing the stamp to reset. Couple of things you need
>to check out. Don't worry about powering the stamp, the BOE is
>prewired for that task. Worry about how the servos are wired. Make
>sure that your servos are connected with the red to the Vin (for
>power) and black for the Vss (for ground). The white obviously goes
>to the pin that you want to assign it to. Next, worry about how you
>are going to smooth out the drain in power that will occur each time
>you start up the servos. A large 3300uF capacitor should help here.
>wire it with the positive lead to Vdd and the negative to Vss. let
>me know if you still have problems.
>
>
>
>--- In basicstamps@egroups.com, Ben Brown <ben@h...> wrote:
>> I have a BOE bot that has a reset problem. During servo usage, the
>> stamp resets. Doesn't matter how new the batteries are if I run
>the
> > servo's backwards, then try to cange direction, the stamp resets.
>If
>> I attach ad lcd, the stamp resets every tim the servos try to move.
>>
>> Is the stamp on the BOE powered from the BOE voltage regulator, or
>> from the stamps own voltage regulator?
>>
>> Thanks
>> Ben
The newer ones use an LDO part (can't remember the number). The BOE battery
pack at best puts out 6V which is marginal (if even usable) for a 7805. What
is the marking on the regulator?
Also, make sure your 3300uF cap has good connections to the power. You could
also use a bigger cap.
Regards,
Al Williams
AWC
*Floating point math for the Stamp, PIC, SX, or any microcontroller at
http://www.al-williams.com/awce/pak1.htm
>
Original Message
> From: Ben Brown [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=LuWDoXr59z4wb1DeoQ8xyy3-hd_qlmiIPXv2Fy9FXrCkb3xIHiM94wW11WvLLEjRmEonMQ0chpwzaqw]ben@h...[/url
> Sent: Wednesday, October 25, 2000 10:32 AM
> To: basicstamps@egroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: BOE Bot troubles
>
>
> Everything is wired as you suggested, but it didn't help.
>
> I added an extra set of batteries, and this helped a little, but I
> would still get resets areter 30 seconds or so. So I added a few
> pauses directly before and after any direction change. This seems to
> give the cap a chance to catch up with the rest of the pieces. Now,
> I'm only worried about feeding in too much juice. I am also
> concerned that all of these extra steps are involved. I think I will
> check the regulator when I get home.
>
> Do you know the ratings on the BOE voltage regulator?
>
>
> >The BOE design uses a single power supply for both stamp and other
> >devises (in your case, a servo). This can cause quite a drain on the
> >power supply causing the stamp to reset. Couple of things you need
> >to check out. Don't worry about powering the stamp, the BOE is
> >prewired for that task. Worry about how the servos are wired. Make
> >sure that your servos are connected with the red to the Vin (for
> >power) and black for the Vss (for ground). The white obviously goes
> >to the pin that you want to assign it to. Next, worry about how you
> >are going to smooth out the drain in power that will occur each time
> >you start up the servos. A large 3300uF capacitor should help here.
> >wire it with the positive lead to Vdd and the negative to Vss. let
> >me know if you still have problems.
> >
> >
> >
> >--- In basicstamps@egroups.com, Ben Brown <ben@h...> wrote:
> >> I have a BOE bot that has a reset problem. During servo usage, the
> >> stamp resets. Doesn't matter how new the batteries are if I run
> >the
> > > servo's backwards, then try to cange direction, the stamp resets.
> >If
> >> I attach ad lcd, the stamp resets every tim the servos try to move.
> >>
> >> Is the stamp on the BOE powered from the BOE voltage regulator, or
> >> from the stamps own voltage regulator?
> >>
> >> Thanks
> >> Ben
>
>
>
If what Al suspects is true (about the 7805 regulator), contact our sales
Dept at the phone number below. We'll send you a free voltage regulator
upgrade kit. Instructions for upgrading your voltage regulator can be found
in the Robotics! text appendices in the back of the book.
Also, make sure your storage capacitor is across Vdd and Vss and not across
Vin and Vss.
Andy
Andrew Lindsay, Applications Engineer
Parallax, Inc. Technical Support
E-Mail...........alindsay@p...
Voice............(916) 624-8333 ext 113
Parallax, Inc. home page....................www.parallaxinc.com
BASIC Stamp Educational Resources...........www.stampsinclass.com
SX Microcontroller University Resources.....www.sxtech.com
Original Message
From: Al Williams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=q3Ssl61Vp59hN0jNDdInU061okR1f7UGZ4IVqDGvNmumNCMmEWXffWFI9oDNdi3wQXdDOdPHwhhitefFuVU]alw@a...[/url
Sent: Wednesday, October 25, 2000 9:31 AM
To: basicstamps@egroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Re: BOE Bot troubles
I'm curious... some of the old BOEs (not bot's) had 7805-style regulators.
The newer ones use an LDO part (can't remember the number). The BOE battery
pack at best puts out 6V which is marginal (if even usable) for a 7805. What
is the marking on the regulator?
Also, make sure your 3300uF cap has good connections to the power. You could
also use a bigger cap.
Regards,
Al Williams
AWC
*Floating point math for the Stamp, PIC, SX, or any microcontroller at
http://www.al-williams.com/awce/pak1.htm
>
Original Message
> From: Ben Brown [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=QIEzx3GnXeFAuJHAfA-MijJ0177zA_saM4t7npqZCagdCB7ba8h9ce5POO_R4YXTqQeMi850iF_D0qg]ben@h...[/url
> Sent: Wednesday, October 25, 2000 10:32 AM
> To: basicstamps@egroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: BOE Bot troubles
>
>
> Everything is wired as you suggested, but it didn't help.
>
> I added an extra set of batteries, and this helped a little, but I
> would still get resets areter 30 seconds or so. So I added a few
> pauses directly before and after any direction change. This seems to
> give the cap a chance to catch up with the rest of the pieces. Now,
> I'm only worried about feeding in too much juice. I am also
> concerned that all of these extra steps are involved. I think I will
> check the regulator when I get home.
>
> Do you know the ratings on the BOE voltage regulator?
>
>
> >The BOE design uses a single power supply for both stamp and other
> >devises (in your case, a servo). This can cause quite a drain on the
> >power supply causing the stamp to reset. Couple of things you need
> >to check out. Don't worry about powering the stamp, the BOE is
> >prewired for that task. Worry about how the servos are wired. Make
> >sure that your servos are connected with the red to the Vin (for
> >power) and black for the Vss (for ground). The white obviously goes
> >to the pin that you want to assign it to. Next, worry about how you
> >are going to smooth out the drain in power that will occur each time
> >you start up the servos. A large 3300uF capacitor should help here.
> >wire it with the positive lead to Vdd and the negative to Vss. let
> >me know if you still have problems.
> >
> >
> >
> >--- In basicstamps@egroups.com, Ben Brown <ben@h...> wrote:
> >> I have a BOE bot that has a reset problem. During servo usage, the
> >> stamp resets. Doesn't matter how new the batteries are if I run
> >the
> > > servo's backwards, then try to cange direction, the stamp resets.
> >If
> >> I attach ad lcd, the stamp resets every tim the servos try to move.
> >>
> >> Is the stamp on the BOE powered from the BOE voltage regulator, or
> >> from the stamps own voltage regulator?
> >>
> >> Thanks
> >> Ben
>
>
>
it. I will double check, but I believe it was the new regulator.
Also I just recieved to bot about 2 weeks ago. I thought the 7805
regulator was on older BOE's.
Also, I check the regulator a few days ago, and it was showing just
under 5V. I haven't checked it since I added the extra batteries.
And in response to Andy, I also checked the cap. It is inserted Vdd
to Vss, and it is building and holding a charge.
Thanks
Ben
>I'm curious... some of the old BOEs (not bot's) had 7805-style regulators.
>The newer ones use an LDO part (can't remember the number). The BOE battery
>pack at best puts out 6V which is marginal (if even usable) for a 7805. What
>is the marking on the regulator?
>
>Also, make sure your 3300uF cap has good connections to the power. You could
>also use a bigger cap.
>
>Regards,
>
>Al Williams
>AWC
>*Floating point math for the Stamp, PIC, SX, or any microcontroller at
>http://www.al-williams.com/awce/pak1.htm
>
>
>>
Original Message
>> From: Ben Brown [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=NDL74ze91XlI7Vlngiy8rz6Trtyrv1SUsPjNwgQsXN9zRdHLLG-MX1H94eGAXydOL6AUm8GUwFLs_w]ben@h...[/url
>> Sent: Wednesday, October 25, 2000 10:32 AM
>> To: basicstamps@egroups.com
>> Subject: [noparse][[/noparse]basicstamps] Re: BOE Bot troubles
>>
>>
>> Everything is wired as you suggested, but it didn't help.
>>
>> I added an extra set of batteries, and this helped a little, but I
>> would still get resets areter 30 seconds or so. So I added a few
>> pauses directly before and after any direction change. This seems to
>> give the cap a chance to catch up with the rest of the pieces. Now,
>> I'm only worried about feeding in too much juice. I am also
>> concerned that all of these extra steps are involved. I think I will
>> check the regulator when I get home.
>>
>> Do you know the ratings on the BOE voltage regulator?
>>
>>
>> >The BOE design uses a single power supply for both stamp and other
>> >devises (in your case, a servo). This can cause quite a drain on the
>> >power supply causing the stamp to reset. Couple of things you need
>> >to check out. Don't worry about powering the stamp, the BOE is
>> >prewired for that task. Worry about how the servos are wired. Make
>> >sure that your servos are connected with the red to the Vin (for
>> >power) and black for the Vss (for ground). The white obviously goes
>> >to the pin that you want to assign it to. Next, worry about how you
>> >are going to smooth out the drain in power that will occur each time
>> >you start up the servos. A large 3300uF capacitor should help here.
>> >wire it with the positive lead to Vdd and the negative to Vss. let
>> >me know if you still have problems.
>> >
>> >
>> >
>> >--- In basicstamps@egroups.com, Ben Brown <ben@h...> wrote:
>> >> I have a BOE bot that has a reset problem. During servo usage, the
>> >> stamp resets. Doesn't matter how new the batteries are if I run
>> >the
>> > > servo's backwards, then try to cange direction, the stamp resets.
>> >If
>> >> I attach ad lcd, the stamp resets every tim the servos try to move.
>> >>
>> >> Is the stamp on the BOE powered from the BOE voltage regulator, or
>> >> from the stamps own voltage regulator?
>> >>
>> >> Thanks
>> >> Ben
>>
>>
>>
statements. What appeared initially as resets were improper returns that
basically went back to the top of the program. You might try posting the
code your trying to use to allow the gurus here to examine what might be
going on.
Original Message
From: "Ben Brown" <ben@h...>
To: <basicstamps@egroups.com>
Sent: Wednesday, October 25, 2000 1:05 PM
Subject: RE: [noparse][[/noparse]basicstamps] Re: BOE Bot troubles
> I had already seen the trouble note about the regulator and checked
> it. I will double check, but I believe it was the new regulator.
> Also I just recieved to bot about 2 weeks ago. I thought the 7805
> regulator was on older BOE's.
>
> Also, I check the regulator a few days ago, and it was showing just
> under 5V. I haven't checked it since I added the extra batteries.
>
> And in response to Andy, I also checked the cap. It is inserted Vdd
> to Vss, and it is building and holding a charge.
>
> Thanks
> Ben
>
Original Message
From: Ben Brown <ben@h...>
To: <basicstamps@egroups.com>
Sent: Wednesday, October 25, 2000 11:31 AM
Subject: [noparse][[/noparse]basicstamps] Re: BOE Bot troubles
> Everything is wired as you suggested, but it didn't help.
>
> I added an extra set of batteries, and this helped a little, but I
> would still get resets areter 30 seconds or so. So I added a few
> pauses directly before and after any direction change. This seems to
> give the cap a chance to catch up with the rest of the pieces. Now,
> I'm only worried about feeding in too much juice. I am also
> concerned that all of these extra steps are involved. I think I will
> check the regulator when I get home.
***********
Is there any objection to running the servo plus to it's own 6 volt battery?
Just make sure you connect the auxiliary battery negative to the Stamp gnd.
If you still get resets, the problem is not in the power supply.
Ray McArthur
points of errors for beginners, so I took out all gosub calls. I
don't have the code with me here at work, but the problem is still
there if I take out all gosubs.
>Ben, I had a problem with a Basic Stamp program that involved gosub
>statements. What appeared initially as resets were improper returns that
>basically went back to the top of the program. You might try posting the
>code your trying to use to allow the gurus here to examine what might be
>going on.
>
Original Message
>From: "Ben Brown" <ben@h...>
>To: <basicstamps@egroups.com>
>Sent: Wednesday, October 25, 2000 1:05 PM
>Subject: RE: [noparse][[/noparse]basicstamps] Re: BOE Bot troubles
>
>
>> I had already seen the trouble note about the regulator and checked
>> it. I will double check, but I believe it was the new regulator.
>> Also I just recieved to bot about 2 weeks ago. I thought the 7805
>> regulator was on older BOE's.
>>
>> Also, I check the regulator a few days ago, and it was showing just
>> under 5V. I haven't checked it since I added the extra batteries.
>>
>> And in response to Andy, I also checked the cap. It is inserted Vdd
>> to Vss, and it is building and holding a charge.
>>
>> Thanks
>> Ben
>>