This source can be found in several articles on this site. Transistors must be equipped with heat sinks and TIP32 can be used. The bridge diodes can be 1N5402 or a 3A bridge.
We found this circuit in a 1976 documentation. The circuit uses a double gate MOSFET. The circuit...
We found this circuit in a Popular Electronics of the 90s. Its purpose is to detect when it locks...
Carbon microphones are no longer used in most projects. However, finding one in the scrap metal, it...