The laser wireless audio transmission circuit kit, after assembly, can transmit long-distance one-way conversation (duplex intercom needs to buy 2 sets) or transmit audio signals such as mobile phone mp3, and receive audio signals at the receiving end. The basic principle of using infrared laser sound transmission is to convert fluctuating sound into red laser light, then the laser vibration signal is received in the photodiode receiver of the receiver circuit, and the signal is demodulated to achieve sound restoration. The transmission distance can reach 50-100 meters and can be used to make long-distance wireless speakers.
Kit parameters:
Product model: TJ-56-330
Power supply voltage: DC9V (DC power supply)
Board size:
Emitter plate (40*22mm)
Receiver board (26*20mm)
Input: microphone input or 3.5 audio input (automatic switching)
Receiver working voltage: 4~12V
Driver speaker: 0.5W-10W
Speaker PCB size: 18*40 mm
Product Features:
1. One-way intercom phone (two-way intercom calls need to buy 2 sets)
2. Mobile phone mp3 audio transmission (transmission distance: recommended within 50-100 meters, the farther the signal is, the more unstable the signal will be)
Circuit theory:
At the sending end: audio signals such as mobile phones, mp3, and computers input by the 3.5 headphone port, or microphones receive and amplify the sound, and drive the laser transmitter through the transistor S8050, and the audio signal is sent in the form of a laser line. Receiving end: photodiode receiving tube, used to receive the infrared transmitter signal and convert it into an audio signal through the LM386 audio amplifier chip, the audio is amplified and the output signal is output.
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