This circuit was originally suggested by General Electric in 1966 documentation to power decorative high voltage neon lamps. The transformer is 7,500 V for a current of 4 mA.
In this circuit of a 1968 publication the unijunction may be 2N2646 and the transistor BC548. The...
The purpose of this circuit is to improve a trigger circuit using a zener diode. The circuit was...
This interesting circuit of the American publication Electronics Handbook Volume XIII 1993 shows a...