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.
This circuit makes use of an old operational and matched transistors. The circuit can be...
This sound relay, Vox or acoustic switch has a bistable action triggering a relay when the...
The circuit selected is from the 1960 Mullard transistor reference manual. The circuit is powered by...