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Schematics.com | IR Audio Transmitter and Receiver
https://www.schematics.com/project/ir-audio-transmitter-and-receiver-20146/
The IR audio link circuit is divided two parts, one is transmitter section and other is receiver section. The transmitter section works with 9V battery. Here the audio signal input is applied at the base of the Q1 via 1k resistor. Here transistor Q1is used …
Schematics.com | Wireless IR Headphone Transmitter
https://www.schematics.com/project/wireless-ir-headphone-transmitter-10854/
The transmitter turns the sound into a series of pulses. The pulses work like bits in a computer, digitally capturing the sound information. These pulses are then sent to an infrared LED. For the transmitter side, an audio input from PL1 frequency modulates the VCO section of a HEF4046BT PLL chip. The VCO output drives Q1, a switching transistor.
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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