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Assemble both the circuits on separate PCBs. Enclose the transmitter PCB in a suitable cabinet, with IR LED1 affixed on the front side and switch S1 on the top of the cabinet. Keep the 9V battery ...

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Remote operated switch circuit. IR receiver module TSOP 1738 (IRX1) is used to sense the pulsed 38kHz IR rays from the TV remote handset. The IR receiver module has a PIN photodiode and a preamplifier ...

First of all, let us observe its circuit diagram to understand it clearly. This circuit is built around a 3-pin IR IC receiver TSOP 1738 that can detect 38 kHz burst frequency generated by a TV remote ...