The Williams tube works by displaying a grid of charged dots on a cathode ray tube, that are read by a thin metal sheet just in front of the display.
The dots are read by a thin metal sheet just in front of the display. The Williams tube works by displaying a grid of charged dots on a cathode ray tube.
The Williams tube works by displaying a grid of charged dots on a cathode ray tube. The dots are read by a thin metal sheet just in front of the display.
The Williams tube works by displaying a grid of charged dots on a cathode ray tube. The dots are read by a thin metal sheet just in front of the display.