This circuit be Simple Metronome circuit model to be simple. It use the transistor be important equipment by very the circuit is the character Astable Multi vibrator. For produce something the sound beep. By can fine VR1 for get sound tone Generator follow can want. A loudspeaker that use to is supposed to impedance 8 – 32 ohm railing land. For decrease the popularity will down and may lead , output , go to feed reach still the amplifier microphone has changed , capacitors 10 uF. The detail is other , see in the circuit.

　　该电路是简单的节拍器电路，电路结构简单。它使用晶体管组成无稳态多谐振荡器。为了发出报警声。调节VR1可以改变振荡频率。振荡信号由R5与Q3来驱动一个扬声器发声 。