Planning to make a electrical device ?
Based on a meter (scale) it should keep elongating, when the current is supplied.
For instance say we have rod of 3 feet in length (3 pieces). The rod will be in the device,
when I supply the power to the device, it should protrude to 1 feet and then again for more power another 1 more feet and more power another one more feet.
Can some one pls help.