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Wireless Audio Transmitter : 6 Steps - Instructables
https://www.instructables.com/Wireless-Audio-Transmitter/
Step 4: After Building the Transmitter. You should get this after building the PCB. I've used a plastic box to place the circuit.The transmitter has a 2 basically a 2 stage transmitter having a V.H.F. oscillator and a R.F. power amplifier.R.F. output power is 100 milliwats. Frequency of the Transmitter can be set with in 88- 108 MHz band by ...
Wireless Headphones Transmitter Circuit ...
https://www.electroschematics.com/wireless-headphones-transmitter-circuit-schematic/
Wireless Headphones Transmitter Circuit Received by Email This wireless headphones transmitter assures a quality reception over 2 meters. The oscillator frequency is between 1750KHz and 3500KHz and for antenna we use a ferrite bar. IC1 amplifies the audio signal and TC1 is a buffer.
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.
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