This circuit is from the September 1985 issue of Radio Electronics magazine. The circuit has an LED charge indicator and is based on CMOS logic. The MOSFET must be equipped with a heat sink.
This circuit was found in a 80s American documentation. The zener diodes determine the points of...
This circuit is from an old manual, but can be easily assembled as the integrated one is still...
In fact, the 556 consists of a double 555, which can be replaced by these integrated ones. The...