This circuit, which appears elsewhere in this section, is from a 1969 Electronic Experimenter Handbook. The circuit uses components that are still common.
This circuit is from a Popular Electronics of the 90's. Any power MOSFET can be used. The circuit...
August 2017 - STMicroelectronics' new T850 switches with triacs up to 8 A can be obtained from...
This 1970 Electronic Design circuit uses a varactor or varicap. The circuit divides the frequency...