Found in the March 1992 Radio Electronics magazine, this circuit has two supply voltages. The maximum input voltage is 14 V.
This simple injector and signal follower employs a high impedance headset. Transistors can be of...
This well-known siren configuration using complementary transistors is from a 1980s documentation. The...
This vox was found in Hughes documentation from 1968. The circuit uses components from the era. A...