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.
Using a V/F converter this circuit was found in the June 1991 issue of Radio Electronics magazine. The...
Amphenol Sine eco | mate ™ connectors can be purchased from Mouser Electronics for a variety of...
This amplifier for sound equipment was found in the Philips Databook of 1990. The circuit can be...