This filter, found in an old manual, has characteristics of reduced overvoltage given by the graph next to the diagram. Formulas for component calculations are given next to the diagram.
The circuit we present was found in an English magazine from 1980, but it can be easily assembled, as...
We found this circuit in an American documentation from the 90s. The circuit produces a 1 kHz...
By activating S1 the relay closes its contacts only after a certain time interval that depends on C1....