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  • For driving loads I'm using the ULN2003 ICs at the moment, and the L293D which pulls up and down and sinks ~500mA per channel. You can always gang up the outputs for more power - although it's obviously safer on the ULN2003.

    Ever considered FETs? I used VND5N07 on my car ECU, and with a 3.3v output you can get around 2A out of each one, and if you put the output into open drain and pull up to 5v, you can get near 5 amps. I think there are some that work a lot better at 3.3v as well (I'd be interested if anyone knows of any).


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