When the voltage in the circuit exceeds the value set in the trimpot, the LED goes off and, if a low current buzzer is used, it rings. The circuit is from American documentation from 1999.
Published in an old Popular Electronics, this circuit makes use of components that are still...
This high-power flasher for incandescent signaling lamps was found in a 1980s General Electric...
This circuit takes advantage of the LC constant of a capacitor and the coil of a relay to...