Found in the September 1984 issue of Radio Electronics magazine, this circuit uses common components. The trigger characteristics are given by the formula in the diagram.
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...
This circuit was obtained in an old publication from 1979. It describes a simple low frequency...
The LEDs, in addition to flashing if the transistor is good, also indicate the polarity of the...