This circuit was found in a 70s American documentation. The operational amplifier supports a modern equivalent. The characteristics are given next to the diagram.
This circuit is from an old publication from the 1950s. The circuit uses germanium transistors but can be...
In the figure we have the way to trigger a 7555 CMOS monostable with a positive pulse. The time...
This is a dimmer version for incandescent lamps (do not use any other type) from an old...