This circuit was obtained from an American documentation from 1976. The circuit has a dynamic range of 100 kHz. FETs may be replaced by current equivalents.
This circuit was found in an old European documentation. When R2 is cut off the circuit triggers...
August 2017 - Bourns Multifuse AEC-Q200 PTC resettable fuses can be obtained from Mouser...
September 2016 - Mouser Electronics is providing new ultraviolet LEDs VLMU1610 of Vishay suitable...