After the electromechanical timer on [Paul Canello’s] washing machine broke for the third time he decided he needed to stop repairing it and find a more permanent fix. He decided to build his own ...

Here is the circuit that produces five tones. This is a simple toy piano circuit with 555 timer. We can also use this circuit as a Machine gun. Main heart of this circuit is 555 timer IC. The 555 ...