This traditional dimmer configuration for incandescent lamps and heating elements was found in an RCA transistor manual. SCR can be a more modern equivalent like TIC106, depending on the power grid.
Indicated at the time of publication as a “walk man” for MW radios, this circuit is simple and can...
This amplifier can be powered with voltages from 9 to 14 V providing 7W of maximum power under a 8 ohms...
This circuit indicates when a rain is acidic by monitoring its pH. The circuit is from a 90s RE...