Vishay Intertechnology VSH recently upgraded its family of infrared (IR) transceiver modules, namely TFBS4xx and TFDU4xx, with its in-house integrated circuit (IC) and surface emitter chip technology.
Recently, I exhausted my stock of common passive infrared (PIR) motion sensor modules and was looking for a new one to play with. I searched the web for a small type with self-contained electronics.
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