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Adafruit High Power Infrared LED Emitter - STEMMA JST PH 2mm : ID 5639 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Super-bright 5mm IR LED [940nm] : ID 387 : $0.75 : Adafruit Industries, Unique & fun DIY electronics and kits
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How to control IR led using ESP8266 (out pint at 3.3v) and MOSFET to obtain high IR range? - Electrical Engineering Stack Exchange
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Super-bright 5mm IR LED (25 pack) [940nm] : ID 388 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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