This timer, like the previous circuits, uses a currently uncommon integrated circuit. The time is given by capacitor C1 and R2 which has the range of values indicated in the diagram.
Frequencies up to 5 MHz can be poroduced by this circuit. The output is a square wave signal. The...
This is a protection circuit in which, under excess current in the load, the SCR trips by shorting the...
This simple pole search or neon probe for the 110 V or 220 V power grid has nothing unusual, being...