DIY suite infrared wireless module wireless voice transmission module

Use red outside voice Basic principle is by the sound waves into the infrared light (laser), and then hit the infrared vibration signal receiver circuit of infrared diode receiver is received in the, and the signal is demodulated, to achieve sound reduction. The transmission distance can be reached1-2Be used in the manufacture of short distance wireless speaker.

parameter

Infrared transmitter Operating voltage:9-12V PCBSize:19 *25millimeter

Infrared receiver Operating voltage:4~12V Drive loudspeaker:0.5W-10Wloudspeaker box PCBSize:17 *39millimeter

Transmission distance: the proposed 2 meters, more than the farther the signal is not stable

2.Circuit theory At the sending end:3.5Headphone port input audio signal through the transistorS8050The audio signal is transmitted in the form of infrared. Receiving end: infrared receiving tube, used to receive infrared transmitter signal, converted into audio signal throughLM386Audio amplifier chip Audio amplified output signal