Found in the September 1982 issue of Radio Electronics magazine, this circuit triggers a relay intermittently. Triggering is done by a reed switch, but other types of sensors can be used.
This traditional configuration of a white noise generator that uses the junction of a transistor with a...
This circuit is a source that allows antenna boosters to be powered by the signal cable itself, as shown...
We found this code key or coded keyboard in a publication from the 90s. The circuit uses...