We found this circuit in a 1997 documentation. It is possible to automatically reverse the direction of rotation of a three-phase motor. The circuit uses WEG timers and contactors.
The purpose of this circuit, found in a documentation for radio amateurs in 1974, is to amplify noise...
This circuit was obtained in an old American documentation. The integrated circuit used is...
This is a Japanese commercial radio from the 60s. The circuit is listened to by phone and is...