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IR Based Wireless Audio Transmitter and Receiver : 6 …
https://www.instructables.com/IR-Based-Wireless-Audio-Transmitter-and-Receiver/
The Audio signal will be transmitted through an IR LED from the transmitter circuit; the IR signals will be then received by a photodiode which will be placed on the receiver circuit. The audio signal thus received by the photodiode will be very weak and hence it will be amplified by an LM386 amplifier circuit and finally played on a speaker.
Infrared Transmitter and Receiver : 6 Steps - Instructables
https://www.instructables.com/Infrared-Transmitter-and-Receiver/
The IR Receiver The IR receiver used was a 38 kHz infrared receiver module from RadioShack, but just about any will work just a well. This receiver was chosen so that it would reject all other frequencies, but the 38 kHz, including visible light. The 555 Timer The main idea to understand is the 555 timer is in a-stable configuration.
Amazon.com: infrared transmitter and receiver
https://www.amazon.com/infrared-transmitter-receiver/s?k=infrared+transmitter+and+receiver&page=3
Amazon.com: audio ir TRANSMITTER: Electronics
https://www.amazon.com/audio-ir-TRANSMITTER-Electronics/s?k=audio+ir+TRANSMITTER&rh=n%3A172282
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