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.
This is another possible version of a negative voltage generator using a 555 integrated circuit. The...
This timer activates a relay after a time interval of up to 15 minutes has elapsed, starting from...
This circuit was used to regulate the speed of small DC motors of cassette recorders. However, if the...