This simple 1-transistor audio preamplifier appeared in the June 1968 Radio Electronics magazine. The transistor is a general-purpose type of the time. The gain is 14 dB.
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...