This circuit was found in an 80's EDN. The circuit uses a current common CMOS, the 4093 powering an LED. Trigger adjustment is done in a trimpot.
This limit alarm was found in a 1980s US documentation. Comparators can be equivalent and the...
I found this circuit in a doc umentation from the year 1968. It uses germanium transistor and has...
This timer has a divider programmed by BCD switches. The circuit is from a Radio Electronics...