Reverse polarity protection 2 (CB22140E)

This circuit has an improvement over the previous one as it also has an LED indicator for correct polarity.

CB24029E Relay Driver (CB24069E)
We found this circuit in a Radio Electronics issue from August 1970. The circuit drives a 12 V...
Photo FET trigger (CB8329E)
The photo FET is not a common component today. In this 1964 Electronic Design application we have a light...
Positive and Negative Voltage Source (CB19212E)
This circuit can provide both positive and negative voltage outputs from 2 to 12 V with current up to...