This simple circuit was found in the August 1984 issue of Radio Electronics magazine. The circuit monitors the power supply to a computer and has a backup battery.
This circuit transmits signals from a turntable to a nearby AM radio. The circuit is from a...
In the figure we give a suggestion of a high-power stage to excite a speaker with the 2N3055. The...
This circuit is from an old documentation, but it can be elaborated with ease, since the...