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Thread: Robotics with PIC16F877 anyone??
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face BY : Dan Michaels email (remove spam text)



Roman Black wrote:
>>
..........
{Quote hidden}

Roman, thanks for the info. I'll breadboard the L293D to Tamiya
motor/geartrain to the PIC this week, and see what kind of
noise I get. And how hot the L293's run.

The L298's would probably be better, but not as convenient
for a small pcb. Seems to me, however, for high power, if you
simply run the 4 outputs of the L293 out separately, rather
than tying them together 2-by-2, you could directly drive an
external H-bridge made up of nothing more than 2 hi-current
PMOSFETs and 2 hi-current NMOSFETs. The L293's can handle
the hi-voltages, and PWMing its outputs should work with the
2nd H-bridge.

At least this is my perception. And maybe a more flexible
route than worrying about putting a high-current H-bridge
on the small pcb from the get-go.

best regards,
- Dan Michaels
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