Found in a 1990s American documentation, this circuit provides an output voltage approximately 4 times that of the input voltage. Diodes are general-purpose types.
The JFETs of this old circuit admit modern equivalents and their characteristics determine the maximum...
This circuit came out at a Wireless World in January 2000. The circuit can be easily assembled as it uses...
This light-activated switch triggers a 6 V relay. The circuit can operate with 12 V and relays for...