Found in an English publication from the 1980s, this circuit can be built with equivalent transistors such as the BC549. The signal must be applied to an external amplifier.
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...