The step adjustment of the generator output frequency and amplitude is controlled by a single chip microcomputer in order to realize the digitaldisplay.
It consists of a digital controller, SRAM for display data memory, a DC-DC voltage converter, reference current generators, a pre-charge voltage generator, 64 common drivers, and 132 segment drivers.
A scheme of power supply using the super capacitor and the mini manual electrical generator for the hand-held digitaldisplay railway track scale has been designed and realized.