Phototransistor current - use 5k, not 10k


Just to help others: the phototransistors supplied, at least in my starter kit, need a 5k1 resistor, not a 10k resistor as specified in the sample project.

The current supplied by a 10k resistor appears to be too low and all I get is erratic output that constantly varies wildly. Using a lower value resistor solved that perfectly. Took me a few hours of debugging!


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