This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
The figure shows how to use a varicap in a conventional tuning circuit. The circuit may be an...
This circuit uses two light-activated SCRs or LASCRs, uncommon components today. The power depends on...
This transistorized astable for LEDs was found in the January 1992 issue of Radio Electronics...