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Thread: Robotics with PIC16F877 anyone??
www.piclist.com/techref/microchip/devices.htm?key=16F
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face BY : Dan Michaels email (remove spam text)



Roman wrote:
>
>Hi Dan, 6 wire are most common, you get them in everything.
>Maybe I misundertand your circuit? I don't think there
>is any way you can drive two steppers at the same time
>with two h-bridges?? Normally it takes 2 h-bridges to
>drive the 2 windings in 1 motor.


Aww, nuts, time to reboot. Now I mucked everything up here.
Forget the last couple of messages.

Looking again, there are 4 "separate" drivers in each L293
chip that you can wire up in different ways. Each driver
output has both PNP pullup and NPN pulldown. So it only
takes 2 drivers to form one H-bridge. And obviously you
can control a 5-wire stepper with a single chip in a
straightforward manner. No funny games. Sorry.

- danM

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