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phototransistor circuit driver

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So sorry to disappoint, but latest techniques are at least a half century old.

#1 Ground the emitter, add a pullup to the collector, shine a light on the base, and then turn it off. Output on the collector is inverted; it is low for light

#2 Connect the collector to Vcc, add a pulldown resistor to the emitter, shine a light on the base, and then turn it off. Output on the emitter is true; it is high for light.
 
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