This is the version of the previous circuit for vehicles with positive ground. The circuit is from a Radio Electronics from December 1976. A siren is included.
We can use high value electrolytic capacitors in alternating current circuits with the...
In the figure we have the way to use power transistors as rectifiers in a source, replacing common...
This circuit can measure frequencies up to 10 kHz using a digital multimeter or the 7107. The...