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DIY Laser Wireless Audio Transmission Kit Infrared Experiment Electronic KIT

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Transmitter Working voltage: 9-12V (12V transmitting distance is the longest)Receiver working voltage: 5 ~ 12V (the higher the voltage, the louder the volume)Input: 3.5 audio input (computer, mobil...
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Transmitter Working voltage: 9-12V (12V transmitting distance is the longest)
Receiver working voltage: 5 ~ 12V (the higher the voltage, the louder the volume)
Input: 3.5 audio input (computer, mobile phone, MP3, etc.)
Function: Computer, mobile phone, mp3 audio transmission.
Transmission distance: about 20-50 meters is recommended, the farther the signal is, the more unstable it is.
Drive speaker: 0.5W-10W speaker
Transmitter module PCB size: 2.0 * 2.6cm
Receiving module PCB size: 2.2 * 4.0cm

Function introduction:
Magical DIY kit, laser wireless audio transmission system, long transmission distance. It can transmit long-distance one-way call (composed of 2 sets of duplex intercom) or audio signals such as mobile phone mp3, and receive audio signals at the receiving end.

The kit is for mono transmission. If you want two-channel audio, you can buy two sets. Modify the audio input cable. The kit does not come with a battery. Please bring two 9V batteries. The transmitted audio signal is certainly not as good as the wired one, there is a little noise, and the sound is not very loud. It is mainly used for welding practice and fun entertainment. It can be regarded as successful if it is produced. If you mind it, please take it carefully.

working principle:
Using infrared laser to transmit sound, the basic principle is to convert the fluctuating sound into a red laser, and then the laser vibration signal is received at the photodiode receiver of the receiver circuit, and the signal is demodulated to achieve sound reproduction. The transmission distance can reach about 50 meters, which can be used to make long-range wireless speakers.

Circuit theory

Sending end: The mobile phone, mp3, computer and other audio signals input through the 3.5 earphone port, or the microphone receives the sound and amplifies it. The laser transmitter is driven by the transistor S8050, and the audio signal is sent in the form of a laser line.

Receiving end: Photodiode receiving tube, used for receiving infrared transmitter signals, converted into audio signals, and the audio signals are amplified and output signals through LM386 audio amplifier chip.

Package Included:
1 x DIY Laser Wireless Audio Transmission Kit Infrared Experiment Electronic KIT
*batteries are NOT included
Instructions are NOT included. We don't provide technical assistance please make sure that you are familiar with the product before purchasing.

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