5 Matched Pairs Side Looking 935nm IR LED & Phototransistor OP140 & OP550 OPTEK | eBay
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10pairs, 3mm/5mm 940nm Infrared Emitting Diode And Ir Receiver Phototransistor,ir Led Pair,ir+pt - Diodes - AliExpress
Solved A pair of infrared LED and phototransistors are used | Chegg.com
Solved A pair of infrared LED and phototransistors are used | Chegg.com
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infrared - How to extend useful life of IR LED and photodiode pair - Electrical Engineering Stack Exchange
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bjt - IR Led & Phototransistor pair bandwidth issue - Electrical Engineering Stack Exchange
The Basics of Photodiodes and Phototransistors | DigiKey
Infrared Phototransistor (5-Pack) - ProtoSupplies
Breakout Board for Vishay IR LED and PhotoTransistor - IRI
Amazon.com: Phototransistors LED/Sensor Matched Pair (100 pieces) : Industrial y Científico
infrared circuit Page 9 : Light Laser LED Circuits :: Next.gr
6. Free Space Optical Communication Link — elec2210 1.0 documentation
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OPS666 - Tt Electronics / Optek Technology - Optical Switch, LED and Photosensor Pair, Phototransistor
20 pairs, 0603 SMD, 940nm IR LED Pair, Emitting Diode SIR1921C and Phototransistor PT1921B| | - AliExpress
SOLVED Chinese IR emittor/phototransistor pair doesn't seem to work - General Electronics - Arduino Forum
