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Old 04-16-2014, 08:34 PM   #33 (permalink)
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yah opto's are doable, the slow ones are like $0.20 a piece, if you can live with a slower baud rate they are fine.

Faster ones cost a bit more and have larger power requirements.

FYI, in the "one cpu per cell" model I am working on only using them on the ends of the battery pack, and node to node communication uses a level shifter. But per cell cost is important, and it should be fast and still operate within the expected voltage range.
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