Found in an Elektor from the 90s, this circuit can be powered directly by the power grid. The circuit uses a rectifying bridge that can be replaced by 4 common diodes.
This circuit from a 1970s General Electric publication applies to motors of the series winding type....
This microphone preamplifier with output intensity adjustment is suitable for modulating...
This circuit is from a project published in the March 1996 Electronics Now magazine. The author used...