This indicator circuit used and game machines (arcades) to indicate that the machine is being shaken was found in NASA documentation. The circuit uses as a sensor a container with water and three sensors.
We found this circuit in an old oscilloscope publication. With it, it is possible to observe the B...
This interesting circuit found in an old documentation uses neon lamp to indicate the percentage of...
This circuit was obtained in an American documentation translated in the 80's. The circuit can be...