This old two-stage video amplifier uses integrated circuits that are not easily obtainable today. The circuit is for analog video and was found in an American 1980s documentation.
With this circuit it is possible to use a DC buzzer (not a transducer) as an extension of the...
This circuit allows feeding a small semiconductor laser to obtain a useful resource for...
This circuit comes from a Gernsback Publications of the 90s. The circuit uses a general-purpose transistor as...