We found these circuits in a 90s Radio Electronics. In them, we have the way to turn a load on and off using pressure switches. The circuit can be used with other types of direct current load.
Employing transistors of the time, this circuit was found in a documentation from 1963. The coils...
This triac circuit was taken from an article in the July 1970 Radio Electronics magazine. Note the...
In this 1990s circuit, found in a National Semiconductor manual, the output voltage is the square of...