Sound control recording controller circuit schematic

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Photocoupler

This circuit is about the voice-activated recording controller circuit, which consists of sound wave receiver, preamplifier, power amplification, audio rectification and electronic delay switch. After receiving the acoustic signal, the microphone MIC outputs the corresponding electrical signal to the preamplifier VT1 for amplification by C2. After amplification, the signal has two outputs: a route emitter output, which is sent by the plug XP1 through the shielded line through R6 and C4. The external microphone jack of the recorder is used as the recording signal, and the other route collector output is sent to the 3 pin of the IC through C3 and RP1 for power amplification. After the power amplifier, the audio signal is rectified by VD1 and VD2 audio and then charged to C8.