Wednesday, August 29, 2012

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NE555 12VDC Fluorescent Lamp Driver Circuit

This is a circuit of 12VDC fluorescent lamp Driver for those who look for Fluorescent lamp driver using ordinary transformers. The transformer used is a step-down transformers from 120 to 6V in reverse, so that with primary voltage 12V could produce 350V for output. This voltage is used to turn on the fluorescent lamp without heating the filament.
NE555 12VDC Fluorescent Lamp Driver Circuit
The IC1 TLC 555 is wired as an astable multivibrator for producing the necessary oscillations.The MOSFET Q1 is used to amplify the oscillations produced by the IC1.The out put of MOSFET is connected to the primary of the step up transformer to produce a ~350 V AC for driving the florescent lamp.

  • Take note that heat sink should be used on Q1, and be careful of the electric shock from the output voltage!
  • For T1, use a 10W ,230V to10V step down transformer in the inverted configuration.That is 10V winding must be connected to the MOSFET side and 240V winding must be connected to florescent lamp side.
List Component of 12VDC Fluorescent Lamp Driver
C1    : 100uF/25V 
C2,C3 : 0.01/25V Ceramic Capacitor
C4    : 0.01/1kV Ceramic  Capacitor
R1    : 1K
R2    : 2.7K
Q1    : IRF510 MOSFET
U1    : NE555 Timer IC
T1    : see note
LAMP  : 4W Fluorescent Lamp

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