Here is the schematic of a simple flouroscent lamp driver circuit based on two transistors.The circuit uses capacitive ballasting for driving the tube.An 8 W standard flouroscent tube can be efficiently driven using the circuit.
The two transistors (2Sc 1983) with associated components forms a oscillator around 1KHz.The oscillator is wired so that saturation condition of the transistors are prohibited.This adds on to the efficiency of the circuit.The circuit produces a clean sine wave with very less noise.
Circuit diagram with Parts list.
- Use a 12 V battery as the DC voltage source.
- Use a 8W florescent lamp as load.
- The winding details(no of turns) are given in the circuit.Use 0.8 mm dia enameled copper wire for primary and 0.4 mm dia enameled copper wire for secondary.The core can be a ferrite core.The primary should be wound first and secondary on top of it.