Using the name of varactor this circuit was found in the Radio Electronics magazine of July 1982. Varicaps of any type can be used and the components selected according to the component.
This circuit can be used as a time automation for driving motors in robotics and mechatronics. What we have...
The source used in this timer is of the type without transformer and regulated by the 7 W zener. The...
This trigger-delay circuit was found in a 1960s General Electric unijunction transistor manual. The...