The integrated circuit used in this circuit is from the time of publication. The circuit is from a Radio Electronics from October 1987. The triac must be equipped with a heat sink.
This simple 555 component tester was found in the November 1992 issue of Radio Electronics...
The basic idea of this 1998 documentation project is to use the channel selector of an old analog...
This circuit, found in a publication of the year 1968, uses a MOSFET at the input to increase...