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.
Our company can provide many kinds of high quality vehicle Alarm Speakers,with the advantages of novel appearance, it has clear sound quality, waterproof, corrosion resistance, and good sealing performance.
All electro-acoustic parameters have reached the leading level of similar products, and are widely used in special products police Dept. Fire Dept. Ambulance and fixed places for alarm matching use so on ! it can match with with our all siren products to work !
Alarm Speakers,Emergency sirens,Emergency Siren Speakers,Warning Sirens,siren speakers
Taixing Minsheng Electronic Co.,Ltd. , https://www.ms-speakers.com