This circuit was obtained in a 90s Popular Electronics. It is used for tuning on AM radios. The field effect transistors used support equivalents.
This circuit has an input impedance of 10 M ohms. We found it in the October 1993 Electronics Now...
This circuit is suggested by Texas Instruments in his Optoelectronics Sourcebook. The transistors...
This dimmer for incandescent lamps was obtained from an American 1990s documentation. The circuit...