Acoustic relay, switching the load from cotton, 10-12 volts 120 watts

The device reacts to sound (clap, knock, etc.) and allows enable/disable different devices. The total load power is 120W. U pit.= 10...12V.

DD1 chip: KTM. Relays can be used RES (round) for 12 volts. As the piezoelectric element can be used RFP-22 or electret microphone from the radio.

Publication: r-ks.ru, www.cxem.net