We found this circuit in a 1968 General Electric publication. The circuit uses an SCR of the time, but any modern equivalent can be used. The relay must have contacts that support the horn current.
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...