This circuit was originally suggested in a 1968 publication to generate a white mark (frame) on a film at regular intervals to serve as a time reference.
This multi-purpose power supply provides voltages of +15, -15, 300 and 1 000 V and is very useful on...
The two damped oscillators shown can be adjusted to generate the drum sound when we touch the...
This circuit was found in a Popular Electronics from the 80's. The circuit can be applied to any...