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BOJACK LED Infrared Emitter and IR Receiver Diode, LEDs Infrared Emission and Receiver Tube for Arduino (Pack of 10 Pairs): Amazon.com: Industrial & Scientific
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Amazon.com: Gikfun 5mm 940nm LEDs Infrared Emitter and IR Receiver Diode for Arduino (Pack of 20pcs) EK8443 : Industrial & Scientific
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