This configuration that appears in other points of this section was obtained in a 90’s Popular Electronics. The circuit can be applied to other operational ones.
With this circuit general purpose diodes and rectifiers can be tested with ease R has 100 ohm for...
This circuit is from 1976 documentation, but it can be assembled with more modern transistors like...
This circuit can provide constant currents adjustable between 1 and 10 mA. The transistors can be...