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Topic: Chip Question (Read 601 times) previous topic - next topic


Hey guys i would like to create an H-bridge that will allow my Arduino to control a small 5v DC Motor. i was wonder can -PS2501-4 Optoisolator work as the L293D motor controller/ driver chip (IC) on this site? http://luckylarry.co.uk/arduino-projects/control-a-dc-motor-with-arduino-and-l293d-chip/

Thanks in advance for the help :)


Not sure why you don't want to use a regularl motor driver IC, but...

I've never seen a circuit using opto-isolators for the drive elements of an H-bridge type of circuit, but I think it will work. You would be limited to 50 mA and you would have to use clamp diode across the transistors since you might get more than the max C-E voltage (7V) when you switch the motor off or PWM. I can't think of any other reasons it won't work.

Steve Turner


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