We found this circuit in an 80's Radio Shack publication. The circuit uses a company buzzer, but modern equivalents can be employed according to the power used. The SCR can be the TIC106 and the transistor the BC558.
We found this circuit in an 80's Radio Shack publication. The circuit uses a company buzzer, but modern equivalents can be employed according to the power used. The SCR can be the TIC106 and the transistor the BC558.
