Found in old documentation, this circuit consists of a simple power source where the transistor must be equipped with a heat sink. A indicated transistor can be the TIP32.
This circuit is from a Popular Electronics from the 90s. The circuit has a tone frequency...
This solar powered circuit was found in a 1991 documentation. The transistor is a general purpose...
This circuit is based on a common cathode 7-segment display. The circuit is based on CMOS...