12 Volt Fluorescent Lamp 20W Drivers

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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!

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

This entry was posted on Wednesday, October 3rd, 2007 at 10:36 pm and is filed under Automotive, Circuit, Lighting, inverter. You can follow any responses to this entry through the RSS 2.0 feed.