Level Detector (T1735E)

This level sensor circuit was found in an article in Radio Electronics magazine from March 1960. It was used in glass manufacturing equipment.

Telephone Dialer (CB5979E)
This circuit is from the 80's, using an integrated of the time. The circuit serves as a reference,...
AC to DC Converter (CB5098E)
This circuit was obtained from an American 80's documentation. The operational ones can be...
741 Logarithmic Amplifier (CB25723E)
This logarithmic gain operating configuration was found in the June 1994 Electronics Now magazine. The...