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Diodo Emisor LED IR de 5mm, 850nm, 940nm, receptor emisor infrarrojo, Fototransistor, fotodiodo Invisible, PCB DIY, 100 Uds. - AliExpress
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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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