We found this circuit in an old documentation. Its purpose is to turn on warning lights when the vehicle in a garage touches or passes a sensing bar preventing it from hitting the wall.
This circuit uses a common-cathode 7-segment display powered from a decoder and a 0-9 counter. The...
This configuration is used to display the characteristic curve of a diode in the virtual...
This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer...