This circuit was obtained from an Electronic Design of 1968. The circuit uses components of the time that can eventually be exchanged for current equivalents.
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...