12 Volt Fluorescent Lamp 20W Drivers

Here is the schematic diagram for a 20 Watt driver. I developed this circuit in 1985, and used it to build a lamp that found much use both as camping light and as emergency light during the then-frequent power outages.
View Image Circuit
The two transistors work as a push-pull oscillator. To avoid crossover conduction, during operation the bases are self-biased to a slightly negative voltage by the 1R5 resistor. The 220uF capacitor gives strong positive bias during power-up, in order to get the oscillator started. 2k2 resistor’s only purpose is discharging the capacitor when the circuit is switched off, so it will restart the next time too!

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http://ludens.cl/Electron/Fluolamp/fluolamp.html
Thank you.

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