As shown in FIG economic fluorescent display circuit. The core of the circuit is the multivibrator 555 and R1, R2, C1 and other components of the oscillation frequency is f 1.4
4/(R1 + 2R2) C1, the icon parameter corresponding frequency of approximately 4kHz. FIG filament DC bias of VDD R4/(R3 + R4) F 6V. This circuit can be coupled with a DC voltage Vp-p and a voltage of about 4V 6V AC voltage to the fluorescent nkHz charactron filament calculator, so that the fluorescent charactron work displayed. The circuit configuration is simple and easy to manufacture.