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Author Topic: H-bridge and voltage regulator problems  (Read 1039 times)
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Hi, I'm using a L293D H-bridge to control two 3v motors, and controlling this with arduino. To power the motors I'm using a Lm7805 5v voltage regulator to power the motors (them work good in 5v). The problem is that when I use the h-bridge with an external power, it works really good, but when I power it with the same 9v battery used to control the arduino (while this is powering the arduino), they don't work (of course, regulating the voltage with Lm7805). I can see that them try to move, but they can't.

Can somebody help me? Thanks!
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Can somebody help me? Thanks!
Sure. What's you problem with the forum?

If you are having a forum problem, you are in the right place.

If you are having a hardware or software problem, you are not.
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Lol best repost in the right place  :-[ does your arduino stay on when the motors start to try and move? you could be shorting out your h-bridge and using all of the one amp from your regulator.
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