1. DC drive

It means that each segment code of each nixie tube is driven by an I/O port of a single-chip microcomputer, or decoded by a two-decimal decoder such as BCD code. The advantage is that the programming is simple and the display brightness is high, but the disadvantage is that it occupies a lot of I/O ports.

2. Dynamic display driver

All the digital tubes are controlled by the COM terminal of each digital tube in turn through the time-sharing, so that each digital tube is controlled and displayed in turn. Connect the end of the same name of the 8 display strokes "a, b, c, d, e, f, g, dp" of all the digital tubes together, and add a bit gate control circuit for the common pole COM of each digital tube, The bit strobe is controlled by each independent I/O line, when the single-chip microcomputer outputs the font code.

All the nixie tubes receive the same font code, but which nixie tube will display the font depends on the microcontroller's control of the bit gate COM terminal circuit, so we only need to turn on the gate control of the nixie tubes that need to be displayed. This bit will show the font, and the digital tube without strobe will not light up.