This integrated amplifier was used in televisions from the 70s, with good sensitivity characteristics. The circuit was powered with 9 V.
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...