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Circuit Diagram of 555 Economy Fluorescent Display Filament

2016-12-11 05:47  
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Circuit Diagram of 555 Economy Fluorescent Display Filament Voltage Supplier
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).