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.
This simple two-transistor receiver was found in Radio Electronics magazine from September 1960....
We found this circuit in an article in Radio Electronics magazine from November 1971. The circuit has...
This single trigger circuit has been indicated for photography applications. The circuit is from a...