Gonzalo Palarea wrote:
>
> If you don't need to control the speed of the DC motors, just be able to
> make them run to one side or the other, I have used the following circuit,
> which uses 2 NPN and 2 PNP, 2 pins of the pic, and you can power the motor
> with a different source than the pic (ie pic with 5V and motors with 8V).
> Be sure to NEVER place a "1" on both inputs at the same time!  Both inputs
> in "0" will cause the motor to stop.  A "1" on one input will make the motor
> turn to one side, and a "1" on the other will make it turn to the other
> side.  The circuit will "loose" aprox. .6V (.3 in each transistor), so if
> you need to power the motors with exactly 6v, you will need a 6.6V power
> supply.  Here comes the circuit (one of the motor wires is "A" and the other
> is "B"):
>
>    8V   0------------------------
>                 |               |
>                /                 \
>  ____/\/\/\__|<                   >|____/\/\/\__
>  |           |\                   /|            |
>  |             \                 /              |
>  |              |__           __|               |
>  |                  A        B                  |
>  |                                              |
>  |                                              |
>  |                                              |
>  |                                              |
>  |                  B        A                  |
>   --------------|--           --|---------------
>                 |               |
>                /                 \
>    __/\/\/\__|/                   \|____/\/\/\__
>              |\                   /|
> to pic         >                 <              to pic
>                 |               |
>                 |               |
>                 _               _
>                 -               -
>
> At 08:41 PM 11/29/96 -0800, you wrote:
> >I have a motor control circuit (H-Bridge) and its powered off 6 volts.
> >I am using a pic to control the motors, and my problem is that since I
> >am only supplying 5 volts and the control, the motors don't go their
> >full speed. How can I fix this. I realize this is not a programming
> >question but it still involves a PIC and I couldn't find anyone else to
> >ask...:)
> >
> >Thanks a lot, I know you guys will come through for me.
> >
> >
> ____________________
> Gonzalo Palarea
> chalo@infovia.com.gt
thanks a lot...