This circuit was found in a 1966 General Electric documentation. The circuit makes use of PUTs that are uncommon components today. Counting direction depends on the programming in A and B.
The operational amplifier used in this circuit is not common today, but it can be implemented with...
This circuit is used to test triacs. It can be connected in series with a resistive load such as...
In the figure we have the configuration of a transistor as a temperature sensor. The circuit is...