This circuit uses a transistor to trigger the alarm from a low quiescent current sensor. The relay is 12 V. The circuit is from Radio Electronics magazine, April 1975.
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...