This circuit was found in a 1964 Electronic Design. The transistors are of the time, but can be employed as modern equivalents. The system is for car with contact breaker.
This circuit was found in European documentation from the 1980s. The unijunction may be 2N2646 and the...
The figure shows how to obtain a higher output current for an operational amplifier. With the...
We found this circuit in a publication about operational in the 90s. The circuit is based on the...