Found in a 300 Circuits from the 90s, this circuit can deliver a maximum current of 50 mA. The output is 20 V with a 12 V input.
This circuit, from the 90's, is intended for operation with vinyl record players of the time, as...
Using a zener diode it is possible to change the linearity of the scale of an analog instrument by...
Found in American documentation from the 1980s, this circuit prolongs the ringing of a doorbell or chime...