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.
With this source, it is possible to obtain a higher output voltage than that obtained by the...
This alarm circuit triggers when S1 opens. The circuit from a January 1975 Radio Electronics...
This circuit was suggested by Signetics in 1980s documentation. The circuit makes use of the...