Found in a 1993 Electronics Experimenter Handbook, this circuit uses a multimeter to measure capacitance. The circuit is powered by 12 V.
With the values of the components indicated, this timer controls intervals from a few seconds to a...
This 80's circuit uses a light-sensitive SCR or LASCR and a one-sided silicon switch SUS, uncommon...
This circuit, found in ancient US documentation, allows you to switch the antenna from the...