This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that admits an equivalent. The instrument is a 250 uA full-scale microammeter.
This circuit can be used as a shield for sensors or analog circuits connected to the digital input...
This simple TTL circuit generates sequences of musical notes that can be determined by adjusting R5 and...
This traditional version of astable signaling transistors was found in an American 1980s...