Upon pressing the switch, the circuit generates a pulse whose duration depends on C. The transistors can be BC548 and the power can be between 1 and 6 V. The circuit is from a 1975 publication.
This circuit acts on a relay disconnecting the load when the input voltage exceeds the set limit....
This isolated shield for triac was found in old European documentation. The resistor R1, in fact,...
This circuit, from the SGS manual of linear integrated circuits of 1982, uses the muting input to...