We have many ways to build a metronome circuit. First, using transistor so easy way and cheaper. But now I try IC-555 timer. It also easy and drive a speaker directly. Even can emit two sound effect metronome. It is hard that I tell you. Sometimes you have to build it with yourself.
How it works
This is 555 metronome circuit. For sound origin Metronome strange music is good. By use the integrated circuit timer. The highly popularnumber NE555 or LM555 from the circuit uses IC this 2 pcs. frequency tall low origin alternates can give tone sweet voice. The VR1 use for fine the sound that want. By this circuit uses 8ohm small-sized loudspeakers. Then seeks to buy all not difficult equipment. Request have fun the electronics , be lucky.
Up to $20 shipping discount on first order now: https://jlcpcb.com/quote