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Infrared Transmitter / Decoder
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This circuits consist of two parts, the first part will transmit a signal upon press of a button, and the second part will detect that signal and trigger a relay...kinda like a simple remote control...

 

Parts List:
Component: Value: Datasheet: Qty:
Resistor 470 Not Available 02
Resistor 220 Not Available 01
Resistor 1K Not Available 01
Transistor 2N2222 Available 02
IC 74LS14 Available 01