We found this circuit in the May 1996 Electronics Now magazine. The relay must have a voltage according to the circuit power supply and a trigger current of no more than 50 mA.
Found in a 1980s telecommunications documentation, the circuit presented acts as a product...
This circuit was found in the Electronics Experimenter Handbook from 1991. The circuit controls a simple...
The time obtained in this circuit, from a 1978 publication, depends on R3 and C. R3 can have...