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uxcell 50pcs 3mm 940nm Infrared Receiver Diode DC 1.2V LED IR Receiver Light Emitting Diodes Black Round Head: Amazon.com: Industrial & Scientific
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5mm Ir Leds Emitting Diode 850nm 940nm 2pin Infrared Emitter And Ir Receiver Diode Phototransistor Photodiode Invisible Diy - Light Beads - AliExpress
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