Circuit Diagram of 555 Economy Fluorescent Display Filament Voltage Supplier

Published:2011/4/26 18:32:00 Author:Christina | Keyword: Economy, Fluorescent Display, Filament Voltage | From:SeekIC

Most fluorescence filament code tubes of the calculator need to add the 6V DC and the several KHZ AC voltage (VP-P voltage), this circuit can meet the requirement. As shown, 555 and R1, R2, C1form the astable-multivibrator, the oscillation frequency f=1.44/(R1+2R2), C1 is about 4KHZ. And the DC bias of the filament is VDD·R4/(R3+R4)≈6V. Welcome to reprint, the information is from the Weiku Electronic Market Network (www.dzsc.com).



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