Kit 10 peças - LED Fototransistor Receptor Infravermelho TIL78 3mm (PTH) Led Achei Componentes Eletrônicos - Loja Virtual Led
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infrared - Understanding voltage and current of a phototransistor w/ collector resistor - Electrical Engineering Stack Exchange
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WUBBHIN LED Light Emitting Diodes 10 pairs, Side Looking, 940nm IR LED Pair, Emitting Diode SIR4045 and Phototransistor SGPT4045 for Science Project Experiment : Amazon.co.uk: Business, Industry & Science