This circuit was originally intended to operate with a solar source for experiments. Transistors are general purpose, and the output current is relatively low.
We found this circuit in a 1981 documentation. The circuit can still be easily assembled, as it...
This circuit was obtained in an old publication from 1979. It describes a simple low frequency...
This circuit was found in a 90's EDN. It can be implemented with either TTL or CMOS logic and used...