12 V Florescent lamp driver circuit

admin April 7, 2010 8 Comments


Here is a simple and effective circuit for driving florescent lamps from a 12 V supply.The circuit is nothing but consists of an oscillator, a MOSFET switch and a step-up transformer for driving the florescent lamp.

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 ~400 V AC for driving the florescent lamp.

Circuit diagram with Parts list.



  • C3 and C2 must be 25V ceramic capacitors.
  • C2 must be electrolytic.
  • 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.
  • Use a 12V lead acid battery for powering the circuit.
  • It is better to fix a heat sink to Q1.
  • The florescent lamp can be of a 4W one.
    June 22, 2014

    can u replace that fluorescent by an economical lamp?

  • Ramesh
    May 9, 2014

    This is excellent website please update circuits day to day

  • Seetharaman
    September 30, 2010

    Hi Ashu yes you change the transformer with 10 volt / 230 volt 60VA rating transformer. other circuit is same. battery should be capable of providing 5amps X number of hours required.

  • aSHu
    September 30, 2010

    I need a12v, 40w florescent tube circuit. will it do if i change the transformer of this circuit?

  • seetharaman
    August 1, 2010

    Hi Mohammed
    C3 with transformer is a tuned circuit to transfer the energy to tube with high efficiency.

  • Mohammed
    July 31, 2010

    Way used C3 in this circut.

  • July 19, 2010

    is it true?

  • khan
    April 30, 2009

    i like this website

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