This circuit was suggested by Sprague Electric in an 80's documentation. The circuit uses a tachometric sensor for feedback. The current was not indicated in the original documentation.
In the figure we have the way to adjust the output null of an operational. The configuration...
We found this voltmeter in a 1977 Radio Shack documentation. The integrated circuit can be the...
This is a simple source indicated for powering low voltage projects on the bench. The circuit is...