RF or even switching transistors like the 2N2222 can be used in this circuit. The capacitors are ceramic and the frequency is determined by the crystal.
This circuit was found in a 1992 Electronics Hobbyst Handbook. The circuit is for the 110 V power...
The TBA810 integrated circuit is no longer common today. This circuit shows an application of this...
This soft starter dimmer was found in a 1980s documentation. We can implement it with current...