This circuit provides an audible signal when testing a TTL circuit. The circuit is from an old documentation, being fed with the 5V of the circuit under test.
This interesting touch dimmer was obtained in a 1993 publication, basically consisting of a...
This circuit was found in an Electronic Design from the 90s. The circuit uses a type J...
This amplifier was published in Radio Electronics magazine in September 1959. The 8-transistor circuit...