Found in a radio amateur magazine of the 1980s, this circuit uses components that can still be found easily. The circuit is for NiCad batteries.
This circuit, which can be used as a shield, was found in General Electric documentation from the...
The circuit shown in the figure can be used to connect a loudspeaker to an amplifier only after...
Found in 90’s English documentation, this rising and falling siren, manually activated, drives a...