This very simple amplifier was found in the Philips Databook of 1990. The circuit is suitable for headphones and other battery powered applications.
Here we show an oscillator that uses an LC network. The upper limit depends on the power-supply...
This circuit from a Popular Electronics from the 90s allows you to use an old PC as a digital...
of the National Semiconductor of 1994. The same technique can be used with other operators and the...