Using only one integrated circuit this control was found in an 80's Electronic Engineering. The circuit has the drive's logic information and must be powered by an isolated power source.
We found this circuit in an internet documentation. The circuit uses a 1 mA instrument, and the...
This circuit can be used to measure the frequency of a low frequency square signal. The signal can be...
This circuit is from 1985 documentation. The integrated circuit used is not very common today, but...