Found in an old English publication, this circuit applies to the 240 V network, but can be changed to lower voltages. Transistors are mostly general-purpose, admitting modern equivalents.
The purpose of this circuit is to produce a quick discharge on a shorted battery to attempt its...
This circuit can be connected to the output of alarms or sirens with the 555, CMOS or TTL,...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...