> reverse polled it.

You mean "reverse powered it".


> the problem you are having is not because of the
> motor draw, it is in the 74hc244 and/or the 74hc374
> and you may have problems with some other things
> along the way.  I did the same thing to my Gadget
> Board when I first fired it up and I got the same
> results with the motor drivers getting hot.  Now
> that I think about it, it may even have been the
> 74hc04. I don't remember...  anyway, you can get

I have a DM7414N here, which is the schmitt trigger version of the
74hc04. Might try swapping that in and see if it makes a difference.
Ya think the reverse current might have toasted it and caused it to
leak? If it's partially turning on the h-bridge the wrong way (as a
dead short), that could explain the heat and resets. I'm not enuff of
an electronics guy to know if that's even possible :-)

I don't think the 74hc244 would have anything to do with it. It's not
part of the motor control section.

If it's the 74hc374 latch, I'll have to order that from DigiKey.


> radioshack for fairly cheap.

Not this Radio Shack. They're a joke. They stock nothing useful. Toys
& stereos, etc. and not much else. They have a tiny little
electronics section with a couple things, but they definitely
wouldn't have these chips.

Glen,
  I think the problem relates back to when you first got the board and
reverse polled it. the problem you are having is not because of the
motor draw, it is in the 74hc244 and/or the 74hc374 and you may have
problems with some other things along the way.  I did the same thing
to my Gadget Board when I first fired it up and I got the same results
with the motor drivers getting hot.  Now that I think about it, it may
even have been the 74hc04. I don't remember...  anyway, you can get
all of those for free from Texas Instraments, or even fairchild. or at
radioshack for fairly cheap.  be carefull running the board in this
condition, you may damage the processor.





--- In handyboard@y..., "Glen" <hathaway@d...> wrote:
> I went through the Lugnet message database and this subject has been
> done to death, but I never got a clear answer to my question.
>
> I got a Tamiya bulldozer kit for use with the Handy Board. The 2
> little motors in the gearboxes are very happy with 3 volts.
>
> When I connected them to the HB (one on 0 and one on 2) and ran them
> at (smooth PWM) power level 15, they worked fine, but the 293D's got
> pretty hot.
>
> So I replaced the 293D's with TI SN754410's and tried again. The
> chips still got real hot. I checked the amperage with my DMM (at the
> 10A setting) in series with one motor. I get a reading of around
.30A
> with no change as the motor is stalled.
>
> .30A is 300ma, right? Why should the SN754410 be getting hot at that
> power level? The HB even resets sometimes, tho that could be due to
> motor electrical noise.
>
> Am I reading the meter wrong?
>
> If I can't get decent results, I'll probably end up interfacing a
> HVWTech L298 controller board to the HB. I've got one on another
bot,
> and am very happy with it. And the price is right. Seems like the
> Handy Board's onboard motor control is mighty finicky.

I went through the Lugnet message database and this subject has been
done to death, but I never got a clear answer to my question.

I got a Tamiya bulldozer kit for use with the Handy Board. The 2
little motors in the gearboxes are very happy with 3 volts.

When I connected them to the HB (one on 0 and one on 2) and ran them
at (smooth PWM) power level 15, they worked fine, but the 293D's got
pretty hot.

So I replaced the 293D's with TI SN754410's and tried again. The
chips still got real hot. I checked the amperage with my DMM (at the
10A setting) in series with one motor. I get a reading of around .30A
with no change as the motor is stalled.

.30A is 300ma, right? Why should the SN754410 be getting hot at that
power level? The HB even resets sometimes, tho that could be due to
motor electrical noise.

Am I reading the meter wrong?

If I can't get decent results, I'll probably end up interfacing a
HVWTech L298 controller board to the HB. I've got one on another bot,
and am very happy with it. And the price is right. Seems like the
Handy Board's onboard motor control is mighty finicky.

Has anyone bought Interactive C 3.1/3.2?

Do you think it's worth the $35? I'm considering buying it.

Mr. Leang's code is for a line follower. D is a variable that stores
the state of the last sensor reading of the floor sensors. The code
uses the value to decide which way to steer - something like "left
sensor sees line - D=1, mid sensor sees tape - D=2, right sensor sees
tape - D=3". The steering is adjusted accordingly to keep the sensors
centered over the line.

The variable does NOT refer to the while statements.


--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> Very cool Glen,  I am glad to finnaly have someone to compare notes
> with!  Of coarse we will all want pictures!  I just learned
something
> new in C programming and I think it will solve the problems with
that
> code.  Take a look at this line following code and notice the D=1,
> D=2, & D=3.  I think they are referring to the three while
statements,
> if that is true then that is what I need to do to make my program
work
> right.
>
> /* LINETRAC.C
>               Kam Leang March 2000
>               kleang@e...
>               http://www.leang.com/kam
>
>               Line tracking program for robot using 3 sensor pairs.
>               Robot is assumed to have differential drive
>           configuration.
>
>               To run the program, turn on Hand Board.  Place the
robot
>           on a
>               no-tape surface and press "stop" to acquire
calibration
>           value.
>               Next, place robot on black tape surface and
press "stop"
>           to
>               acquire calibration value.
>
>               Then, to run place robot on tape line and press
>           "start".  Robot
>               will track continuously.
>
>
*********************************************************************/
>
>           int motl=0, motr=1;   /* Define motor left, right motor
>           ports */
>           int s=25;             /* Define motor speed level */
>           int l=4, m=3, r=2;    /* Define left, middle, right sensor
>           ports */
>
>           /* Declare variables */
>           int l_notape,m_notape,r_notape;
>           int l_tape,m_tape,r_tape;
>           int l_tol,m_tol,r_tol,d;
>
>           void main(){
>               calibrate();      /* Run calibration to determine
>           tolerance */
>               init();           /* Run initialize routine */
>               d=3;              /* Assume right sensor saw tape last
>           */
>               while(1){    /* Scanning routine, look for tape */
>                 if (d==3) {
>
>
> while((analog(l)<=l_tol)&&(analog(m)<=m_tol)&&(analog(r)<=r_tol)){
>
>                    motor(motl,s);
>                    motor(motr,-s);
>                    if (analog(l)>l_tol) /* Check which sensor saw
tape
>           last */
>                       d=1;
>                    if (analog(m)>m_tol)
>                       d=2;
>                    if (analog(r)>r_tol)
>                       d=3;
>                    }
>                 }
>
>
> while((analog(l)>l_tol)||(analog(m)>m_tol)||(analog(r)>r_tol)){
>
>                    motor(motl,2*s); /* Drive straight routine once
>           tape found */
>                    motor(motr,2*s);
>                    if (analog(l)>l_tol)
>                       d=1;
>                    if (analog(m)>m_tol)
>                       d=2;
>                    if (analog(r)>r_tol)
>                       d=3;
>                    }
>                 if (d==1) {  /* Find tape if lost */
>
>
> while((analog(l)<=l_tol)&&(analog(m)<=m_tol)&&(analog(r)<=r_tol)){
>
>                    motor(motl,-s);
>                    motor(motr,s);
>                    if (analog(l)>l_tol)
>                       d=1;
>                    if (analog(m)>m_tol)
>                       d=2;
>                    if (analog(r)>r_tol)
>                       d=3;
>                    }
>                 }
>               }
>           }
>
>           /********** Subroutines
>           **********************************************/
>           void calibrate(){  /* Calibration subroutine to determine
>           tolerance */
>              int temp;
>              while(!stop_button()){
>                 l_notape=analog(l);
>                 m_notape=analog(m);
>                 r_notape=analog(r);
>                 printf("No Tape: %d %d
>           %d\n",l_notape,m_notape,r_notape);
>                 sleep(.1);
>              }
>              tone(800.,1.);
>              while(!stop_button()){
>                 l_tape=analog(l);
>                 m_tape=analog(m);
>                 r_tape=analog(r);
>                 printf("Tape: %d %d %d\n",l_tape,m_tape,r_tape);
>                 sleep(.1);
>              }
>              temp=(l_tape-l_notape)/2;
>              l_tol=l_notape+temp;
>              temp=(m_tape-m_notape)/2;
>              m_tol=m_notape+temp;
>              temp=(r_tape-r_notape)/2;
>              r_tol=r_notape+temp;
>              printf("Tol: %d %d %d\n",l_tol,m_tol,r_tol);
>              tone(800.,1.);
>           }
>           void init(){
>              printf("Press Start to  Go!\n");
>              while(!start_button()){}
>              tone(800.,1.);
>              }
>
> What do you think?
> -Dan

Aha! He's using flags. That'll work. Nothin wrong with that.

Ordered a STK500 and some AVR's from DigiKey. They're backordered
till July sometime. Atmel has got to get their sh## together!

So, I ordered a PicAll PIC programmer and some PICs to play with
while I wait. Gonna be real busy learnin new stuff for the next
while. :-)

Very cool Glen,  I am glad to finnaly have someone to compare notes
with!  Of coarse we will all want pictures!  I just learned something
new in C programming and I think it will solve the problems with that
code.  Take a look at this line following code and notice the D=1,
D=2, & D=3.  I think they are referring to the three while statements,
if that is true then that is what I need to do to make my program work
right.

/* LINETRAC.C
               Kam Leang March 2000
               kleang@...
               http://www.leang.com/kam

               Line tracking program for robot using 3 sensor pairs.
               Robot is assumed to have differential drive
           configuration.

               To run the program, turn on Hand Board.  Place the robot
           on a
               no-tape surface and press "stop" to acquire calibration
           value.
               Next, place robot on black tape surface and press "stop"
           to
               acquire calibration value.

               Then, to run place robot on tape line and press
           "start".  Robot
               will track continuously.

*********************************************************************/

           int motl=0, motr=1;   /* Define motor left, right motor
           ports */
           int s=25;             /* Define motor speed level */
           int l=4, m=3, r=2;    /* Define left, middle, right sensor
           ports */

           /* Declare variables */
           int l_notape,m_notape,r_notape;
           int l_tape,m_tape,r_tape;
           int l_tol,m_tol,r_tol,d;

           void main(){
               calibrate();      /* Run calibration to determine
           tolerance */
               init();           /* Run initialize routine */
               d=3;              /* Assume right sensor saw tape last
           */
               while(1){    /* Scanning routine, look for tape */
                 if (d==3) {


while((analog(l)<=l_tol)&&(analog(m)<=m_tol)&&(analog(r)<=r_tol)){

                    motor(motl,s);
                    motor(motr,-s);
                    if (analog(l)>l_tol) /* Check which sensor saw tape
           last */
                       d=1;
                    if (analog(m)>m_tol)
                       d=2;
                    if (analog(r)>r_tol)
                       d=3;
                    }
                 }


while((analog(l)>l_tol)||(analog(m)>m_tol)||(analog(r)>r_tol)){

                    motor(motl,2*s); /* Drive straight routine once
           tape found */
                    motor(motr,2*s);
                    if (analog(l)>l_tol)
                       d=1;
                    if (analog(m)>m_tol)
                       d=2;
                    if (analog(r)>r_tol)
                       d=3;
                    }
                 if (d==1) {  /* Find tape if lost */


while((analog(l)<=l_tol)&&(analog(m)<=m_tol)&&(analog(r)<=r_tol)){

                    motor(motl,-s);
                    motor(motr,s);
                    if (analog(l)>l_tol)
                       d=1;
                    if (analog(m)>m_tol)
                       d=2;
                    if (analog(r)>r_tol)
                       d=3;
                    }
                 }
               }
           }

           /********** Subroutines
           **********************************************/
           void calibrate(){  /* Calibration subroutine to determine
           tolerance */
              int temp;
              while(!stop_button()){
                 l_notape=analog(l);
                 m_notape=analog(m);
                 r_notape=analog(r);
                 printf("No Tape: %d %d
           %d\n",l_notape,m_notape,r_notape);
                 sleep(.1);
              }
              tone(800.,1.);
              while(!stop_button()){
                 l_tape=analog(l);
                 m_tape=analog(m);
                 r_tape=analog(r);
                 printf("Tape: %d %d %d\n",l_tape,m_tape,r_tape);
                 sleep(.1);
              }
              temp=(l_tape-l_notape)/2;
              l_tol=l_notape+temp;
              temp=(m_tape-m_notape)/2;
              m_tol=m_notape+temp;
              temp=(r_tape-r_notape)/2;
              r_tol=r_notape+temp;
              printf("Tol: %d %d %d\n",l_tol,m_tol,r_tol);
              tone(800.,1.);
           }
           void init(){
              printf("Press Start to  Go!\n");
              while(!start_button()){}
              tone(800.,1.);
              }

What do you think?
-Dan

Kinda went insane over the last couple days and spent large
quantities of cash on electronics/robotics. Long story short, my HB
will be on a robot (provided the stuff arrives Friday) by Saturday
night.

Dan, I'll be able to test your code. I ordered 4 of those same IR
sensors as you have. Also ordered a tank-track motorized base. Should
be interesting.

I was pretty baked Saturday night when I was looking at your cdbot.c
code. Couldn't focus right, obviously. :-)

The bump sensor code IS inside the loop.

But some of the following just doesn't make sense to me.

     if(analog(IRsens)>75){
       ao();
       while(analog(IRsens)>75){
         motor(motl,-5);
         motor(motr,-5);
         sleep(0.5);
         if(analog(IRsens)<5){
           while(1);
         }
         else if(analog(IRsens)>=5){
           motor(motl,10);
           motor(motr,10);
           if(analog(IRsens)<10){}
         }
       }

Try this instead (I could be out to lunch on this, but see if it
makes sense to you):

     if(analog(IRsens)>75){
       ao();
       while(analog(IRsens)>75){
         motor(motl,-5);
         motor(motr,-5);
         sleep(0.5);
         if(analog(IRsens)<5){
           ao();
           sleep(0.5);
           motor(motl,-sl), motor(motr,sr);
           break;
         }
         else if(analog(IRsens)>=5){
           while(analog(IRsens)>75){
             motor(motl,10);
             motor(motr,10);
           }
           ao();
           sleep(0.5);
           motor(motl,-sl), motor(motr,sr);
           break;
         }
       }

http://www.handyboard.com/software/contrib.html

Down near the bottom of the page. It is an older version of IC, but
the PWM works perfect.


--- In handyboard@y..., olanvin@a... wrote:
> Hello
> I had just the same problem than Glen with smooth PWM routine: some
values
> don't give the expected result. Where could I load the right
version ?
> Thanks
> Olivier

Hello
I had just the same problem than Glen with smooth PWM routine: some values
don't give the expected result. Where could I load the right version ?
Thanks
Olivier

Nope, not the same on my computer, the robotics club chat has a voice
chat option, and there is a place on the home page that tells you if
anyone is in the chat room.  I will hang out in this chat for awhile
if you want to test it.



--- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> Can't imagine why it would be a different version of chat than the
> one the Clubs use. I just started it up and it displays the exact
> same screen.
>
> --- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> > I guess the bigger issue is weather or not this chat system works,
> the
> > Seattle group uses this forum, and they haven't been able to make
> this
> > chat work right.  The TRCY robotics club uses a better chat
system.
> >   The photo thing isn't really all that big of a deal.
> >  Also I don't know if you can post files at that one like you can
> > here.
> >
> >
> >
> > --- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> > > That's a Club. This is a Group. I didn't notice there was no
> photo
> > > area till you mentioned it. Wanna kill this group and move it to
> a
> > > club, or just post photos in the file section?
> > >
> > > > Hey Glen, why didn't you use the format that the TRCY club
> uses? I
> > > > like their photo area.

Oops, I take that back. It is a little different. Tell me when you'll
be available, and we'll take it for a test drive. Blah, blah, blah...

--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> I guess the bigger issue is weather or not this chat system works,
the
> Seattle group uses this forum, and they haven't been able to make
this
> chat work right.  The TRCY robotics club uses a better chat system.
>   The photo thing isn't really all that big of a deal.
>  Also I don't know if you can post files at that one like you can
> here.
>
>
>
> --- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> > That's a Club. This is a Group. I didn't notice there was no
photo
> > area till you mentioned it. Wanna kill this group and move it to
a
> > club, or just post photos in the file section?
> >
> > > Hey Glen, why didn't you use the format that the TRCY club
uses? I
> > > like their photo area.

Can't imagine why it would be a different version of chat than the
one the Clubs use. I just started it up and it displays the exact
same screen.

--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> I guess the bigger issue is weather or not this chat system works,
the
> Seattle group uses this forum, and they haven't been able to make
this
> chat work right.  The TRCY robotics club uses a better chat system.
>   The photo thing isn't really all that big of a deal.
>  Also I don't know if you can post files at that one like you can
> here.
>
>
>
> --- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> > That's a Club. This is a Group. I didn't notice there was no
photo
> > area till you mentioned it. Wanna kill this group and move it to
a
> > club, or just post photos in the file section?
> >
> > > Hey Glen, why didn't you use the format that the TRCY club
uses? I
> > > like their photo area.

Well, if you did, it's badly broken. As my code steps thru the
numbers from -100 to 100, the motor speeds up, slows down, speeds up,
stops, goes again... and so on. Seems almost random. Very strange.

Skidmore's code works exactly as PWM is expected to.

--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> Hmmm, I thought I used that when I created the custom version...
> anyway, it is really simple, all that has to be done is rename the
> Skidmore file to that of the old PWM file and run another makefile
of
> my custom version.  I will work on it tonight, I want the good PWM
> anyway.
>  Is there anything else that I should add while I'm at it?

I guess the bigger issue is weather or not this chat system works, the
Seattle group uses this forum, and they haven't been able to make this
chat work right.  The TRCY robotics club uses a better chat system.
   The photo thing isn't really all that big of a deal.
  Also I don't know if you can post files at that one like you can
here.



--- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> That's a Club. This is a Group. I didn't notice there was no photo
> area till you mentioned it. Wanna kill this group and move it to a
> club, or just post photos in the file section?
>
> > Hey Glen, why didn't you use the format that the TRCY club uses? I
> > like their photo area.

Hmmm, I thought I used that when I created the custom version...
anyway, it is really simple, all that has to be done is rename the
Skidmore file to that of the old PWM file and run another makefile of
my custom version.  I will work on it tonight, I want the good PWM
anyway.
  Is there anything else that I should add while I'm at it?



--- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> Skidmore's smooth PWM was done sometime like 1997, and was part of a
> 2.82 version of IC.
>
> I want to put it into your customized 2.862 (or whatever it is)
> version.
>
> --- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> > I have a copy of a smooth PWM routine that works with the IC
> > program, I can't remember exactly where I got it though.  I will
> > start posting my HB stuff in the files area for everyone to
> > download, I would appreciate the same from whoever can contribute.
> >  I will check out the files area right away to see about posting.
> > -Dan

Hmm... Simple enuff way to do it. Thanks.

--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> I can't find the origional HB schematic that had the reset button,
but
> it is really simple to do.
>
>  If you want a quick easy place to connect it without any soldering
> involved this is what you do.  Find the extra motor power ports
which
> are right next to the STOP button. It is a four port connection.
Two
> are positive, and two negitive. All you do is get a momentary
switch
> add a 330 ohm (I think) resistor to one side of the switch, then
tie
> the resistor side into the positive port, and the other side of the
> switch to the negitive port and there you have it.  What this does
is
> temporarily drops the voltage accross the 330 ohm resistor and
causes
> the DS1233 voltage monitor (U12) to reset the processor.  It sounds
> crude, but that is how it was done.
>  If you don't want to use the extra motor power ports you can just
> find any place on the board where the Pos. and Neg. are close
together
> and wire the button right in.
>  If the 330 ohm resistor isn't right let me know, I can do the math
> and figure it out again.
>
>  I hope this helps.  -Dan

That's a Club. This is a Group. I didn't notice there was no photo
area till you mentioned it. Wanna kill this group and move it to a
club, or just post photos in the file section?

> Hey Glen, why didn't you use the format that the TRCY club uses? I
> like their photo area.

Skidmore's smooth PWM was done sometime like 1997, and was part of a
2.82 version of IC.

I want to put it into your customized 2.862 (or whatever it is)
version.

--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> I have a copy of a smooth PWM routine that works with the IC
> program, I can't remember exactly where I got it though.  I will
> start posting my HB stuff in the files area for everyone to
> download, I would appreciate the same from whoever can contribute.
>  I will check out the files area right away to see about posting.
> -Dan

I can't find the origional HB schematic that had the reset button, but
it is really simple to do.

  If you want a quick easy place to connect it without any soldering
involved this is what you do.  Find the extra motor power ports which
are right next to the STOP button. It is a four port connection.  Two
are positive, and two negitive. All you do is get a momentary switch
add a 330 ohm (I think) resistor to one side of the switch, then tie
the resistor side into the positive port, and the other side of the
switch to the negitive port and there you have it.  What this does is
temporarily drops the voltage accross the 330 ohm resistor and causes
the DS1233 voltage monitor (U12) to reset the processor.  It sounds
crude, but that is how it was done.
  If you don't want to use the extra motor power ports you can just
find any place on the board where the Pos. and Neg. are close together
and wire the button right in.
  If the 330 ohm resistor isn't right let me know, I can do the math
and figure it out again.

  I hope this helps.  -Dan

I will have to dig them out, but I will try to get them and some
other stuff posted ASAP.
Hey Glen, why didn't you use the format that the TRCY club uses? I
like their photo area.


--- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> You have schematics for that? Post em here if you can.
>
> I could probably figure it out for myself, but I'm lazy :-)
>
> --- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> > Glen, my gadget board  (wich was designed after the Handy board)
> > has a reset button, and the origional Handy board had a reset
> > button, but it was eliminated becuase the power switch essentially
> > does the same thing, and with the start and stop button there were
> > too many "less skilled" people resetting when they actually wanted
> > to bootstrap or start the board. I have schematics that show how
to
> > implement the reset switch if you want it on there.
> >
> >
> >
> >
> >
> > --- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> > > Why wasn't the Handy Board designed with a reset button? It
would
> be
> > > very handy (pun intended), I think.
> > >
> > > Probably wouldn't be too difficult to hack one on. Has anyone
> done
> > > it? Was it worth the trouble?

I have a copy of a smooth PWM routine that works with the IC
program, I can't remember exactly where I got it though.  I will
start posting my HB stuff in the files area for everyone to
download, I would appreciate the same from whoever can contribute.
  I will check out the files area right away to see about posting.
-Dan





--- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> I don't understand the stock 7-speed PWM at all. How are you
supposed
> to select the speeds? I've tried all kinds of values and gotten real
> strange results from my motors.
>
> Then I tried Julian Skidmore's smooth PWM. It works great! Why
> doesn't some ambitious hacker plug it into the latest version of IC?
> If no one else does, I will.

You have schematics for that? Post em here if you can.

I could probably figure it out for myself, but I'm lazy :-)

--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> Glen, my gadget board  (wich was designed after the Handy board)
> has a reset button, and the origional Handy board had a reset
> button, but it was eliminated becuase the power switch essentially
> does the same thing, and with the start and stop button there were
> too many "less skilled" people resetting when they actually wanted
> to bootstrap or start the board. I have schematics that show how to
> implement the reset switch if you want it on there.
>
>
>
>
>
> --- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> > Why wasn't the Handy Board designed with a reset button? It would
be
> > very handy (pun intended), I think.
> >
> > Probably wouldn't be too difficult to hack one on. Has anyone
done
> > it? Was it worth the trouble?

I don't understand the stock 7-speed PWM at all. How are you supposed
to select the speeds? I've tried all kinds of values and gotten real
strange results from my motors.

Then I tried Julian Skidmore's smooth PWM. It works great! Why
doesn't some ambitious hacker plug it into the latest version of IC?
If no one else does, I will.

Blah, blah, blah!!! ;-)

--- In handyboard@y..., "Dan Gates" <topazx2@y...> wrote:
> You just had to get the first word in didn't you!!  LOL
>
>
>
> --- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> > Since I'm the first one here, I get first post. That's all.

You just had to get the first word in didn't you!!  LOL



--- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> Since I'm the first one here, I get first post. That's all.

Glen, my gadget board  (wich was designed after the Handy board)
has a reset button, and the origional Handy board had a reset
button, but it was eliminated becuase the power switch essentially
does the same thing, and with the start and stop button there were
too many "less skilled" people resetting when they actually wanted
to bootstrap or start the board. I have schematics that show how to
implement the reset switch if you want it on there.





--- In handyboard@y..., "Glen Hathaway" <hathaway@d...> wrote:
> Why wasn't the Handy Board designed with a reset button? It would be
> very handy (pun intended), I think.
>
> Probably wouldn't be too difficult to hack one on. Has anyone done
> it? Was it worth the trouble?

Why wasn't the Handy Board designed with a reset button? It would be
very handy (pun intended), I think.

Probably wouldn't be too difficult to hack one on. Has anyone done
it? Was it worth the trouble?

Since I'm the first one here, I get first post. That's all.