Review on KNACRO PCF8591 AD/DA Converter Module: Efficient Analog to Digital Conversion by Mark Hamblin
works, but the board looks very different
delivered without cables and board layout is different but works as it should. What's missing is that the Ax address pins are soldered to ground, so you're stuck at i2c = 0x48 address. But looking at other sources, it seems like they all had ax pins attached to the ground.
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- unreliable
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