40W Fluorescent Lamp Inverter


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Bart Milnes 104,238 116 54
This 40W fluorescent lamp inverter allows you to run 40W fluorescent tubes from any 12V source capable of delivering 3A. This is basically a larger version of the 12VDC Fluorescent Lamp Driver and can be used to light regular or blacklight tubes.

Schematic

This is a schematic of the 40W Fluorescent Lamp Inverter

Parts

Part
Total Qty.
Description
Substitutions
R11180 Ohm 1W Resistor
R2147 Ohm 1/4W Resistor
R312.2 Ohm 1W Resistor (only needed once)
C1, C22100uF 16V Electrolytic Capacitor
C31100nF Ceramic Disc Capacitor
Q11TIP 3055 or 2N3055 or equivalent
L11See "Notes"
T11See "Notes"
MISC1Wire, Case, Board, Heatsink For Q1, heatshrink, AM antenna rod for coil

Notes

  1. Email Bart Milnes with questions, comments, etc.
  2. Wind L1/T1. You will need an AM antenna rod that is about 60mm (2.5 inches) long to wind T1/L1 on. T1/L1 are wound on the same core. Shrink a layer of heatshrink over the core to insulate it. Leave 50mm of wire at each end of the coils.
    Primary: Wind 60 turns of 1mm diameter enamelled copper wire on the first layer and put a layer of heatshrink over it.
    Feedback: Wind 13 turns of 0.4mm enamelled copper wire on the core and then heatshrink over that.
    Secondary: This coil has 450 turns of 0.4mm enamelled copper wire in three layers. Wind one layer and then heatshrink over it. Do the same for the next two.
    Transformer/Inductor Winding
  3. Calibrate/test the circuit. To calibrate/set up the circuit connect the 2.2 Ohm 1W resistor (R3) in series with the positive supply. Connect a 40W fluorescent tube to the high voltage ends of the transformer. Momentarily connect power. If the tube doesn't light immediately reverse the connections of L1. If the tube still doesn't work, check all connections. When you get the tube to light remove the 2.2 ohm resistor and the circuit is ready for use. You will not need R3 again.
  4. This circuit is designed for 220V lamps. It will work with 120V units just fine, but will shorten the life of the tube.
  5. This page has been extensively rewritten by Bart Milne. (15/3/01)

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Comments

Björn Felten
40W Fluorescent Lamp Inverter
Tuesday, May 05, 2009 7:50:13 AM
C3 is C2 and C2 should be removed from the parts list. Check out the original at http://www.talkingelectronics.com/projects/FluorescentInverter/FluorescentInverter.html
jon
40W Fluorescent Lamp Inverter transformer 'ringing'
Thursday, April 02, 2009 6:54:23 AM
When I built this curcuit I connected the transistor to an oscilloscope and the transformer 'ringed' at over 100v! Is there a way to filter this
anonymous
40W Fluorescent Lamp Inverter
Wednesday, March 11, 2009 5:49:07 AM
guys, C3 goes parallel with the lamp. and yes, Q1 does get hot. this is a simple oscillator and not a specialized circuit to drive lamps. it is simple and easy to build, but if you want something efficient, you'll need a better schematic, maybe with specialized IC.
anonymous
40W Fluorescent Lamp Inverter
Sunday, March 01, 2009 2:39:06 PM
Hi I'm quite blind in electronic but I tried build this inverter, because I love challenge my abilities every time do not laugh but there are some ground signals 4 in total which comes from C1, R2, C2 and Q1 What I should with?, and the schematic shows T1 secondary connecting in just one polarity of the lamp, doesn't matter there are 2 each side. Thanks for share with us your acknowledgment. Regards Matthew
sanju
40W Fluorescent Lamp Inverter
Monday, January 26, 2009 12:54:18 AM
My circuit is not work and I did not found C3.please help.
donu gameli
40W Fluorescent Lamp Inverter
Friday, January 16, 2009 8:00:05 AM
my 12v power transf produces 5A of current=60VA. if used for inverter, will it give me 220V, 0.27A for the same 60VA if 100% efficient?----12*5=220*0.27
Srikanth
40W Fluorescent Lamp Inverter
Wednesday, January 14, 2009 5:34:29 AM
Bad Circuit
Mike
40W Fluorescent Lamp Inverter
Sunday, December 14, 2008 9:54:10 PM
This is crazy, using a ferrite rod will radiate RFI all over the place
ANUP BARMAN
40W Fluorescent Lamp Inverter
Monday, November 17, 2008 1:56:48 AM
C3 NOT FOUND
Johnny
40W Fluorescent Lamp Inverter used on High Pressure Sodium Lamp
Tuesday, November 11, 2008 12:43:34 PM
Is there any way to make this curcuit into a 50w Fluorescent Lamp Inverter because the sodium lamp works fine and goes yellow but does not work at full brightness due to it being 10w too low. Even on a 40w fluorescent lamp is the transistor supposed to get so hot? I even put a drop of water on it and it boiled! Is their a mosphet version of this?
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