DIY Kit Infrared Wireless Sound Transmission Module
Description
Red rumored sound kit instructions
Using the basic principles of the Red rumor sound kit is
the sound caused by infrared (laser) vibration, and then hit the
infrared vibration signal is received at the receiver circuit infrared
receiver diode, and the signal is demodulated to achieve sound
reduction. Transmission distance can reach one meter can be used to make
short-range wireless speakers.
First, the electrical characteristicsUsing the basic principles of the Red rumor sound kit is
the sound caused by infrared (laser) vibration, and then hit the
infrared vibration signal is received at the receiver circuit infrared
receiver diode, and the signal is demodulated to achieve sound
reduction. Transmission distance can reach one meter can be used to make
short-range wireless speakers.
Infrared transmitter
Operating voltage: 12V
PCB size: 19 * 25mm
Infrared receiving end
Operating voltage: 4 ~ 12V
Driver Speaker: 0.5W-10W Speaker 1
PCB size: 17 * 39mm
Second, the circuit theory
The transmitting end: the headset port, the audio signal input
through the transistor Fat S8050, an infrared transmitter to drive the
tube, and the audio signal is transmitted in the form of infrared.
The receiving end: the infrared receiving tube for receiving the
infrared signal transmitter, converted into an audio signal through the
LM386 audio amplifier chip, and the audio output signal can be amplified
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