In our childhood, we play the Mini keyboard Casio, which provides different sounds on pressing its different keys.
We can also create such type of multi-tone generator at home easily with easily available electronic components.
We can generate any type of tone through it but we have to add more micro push-button for that
What is a multi-tone Generator?
A multi-tone generator is such a circuit that provides different tones on pressing different push buttons.
Generally, it is the set of micro push buttons connected with resistances that provide different resistances to the transistors and this results in different sounds.
Here for the sound output be used as a speaker but for the better performance we can also use a buzzer.
1) 2n3904 Transistor
2) 2n2646 Transistor
3) 3x 100k Trim pot
4) 3x Push Button
5) 100nf Capacitor