This transistorized circuit appeared in a Radio Electronics magazine in March 1958. The frequency range depends on the tuned circuit, being within a few megahertz.
Found in an Electronic Design from the 90s, this sophisticated continuity tester uses operational...
The circuit in the Multisim Blue simulation sources a regulated voltage to loads up to 50 mA. The...
Found in American documentation, this simple circuit activates a buzzer with embedded oscillator. A...