40W Fluorescent Lamp Inverter

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. # Wind L1/T1. You will need an AM antenna rod that is about 60mm (2. 5 inches) long to wind T1/L1 on. T

1/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 # 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.

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