Cheap fluorescent display circuit 555
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.