This circuit was found in Ferranti's 1967 documentation. The circuit drives a 40 V relay, but it can be adapted to operate with sensitive lower voltage relays.
This circuit was found in the component's own manual, which is not very common nowadays. Note that...
The circuit shown is a Step-Down converter that can provide a 5 A output with 4 to 18 V inputs. The...
This circuit, from a 1988 documentation, makes successive actuation of the shower to control the...