Here is simple circuit of a simple emergency light that can be constructed without much pain. The components of this circuit are 2 transistors, a transformer, 20 Watt fluorescent tube, 6V battery and some resistors and pots. the transformer of this emergency lamp doing a job of stepping up the voltage induced at its primary coil. But we use a 12-0-12 center tapped transformer for this purpose and the usual primary is used as secondary.
Circuit Diagram of 20W Low cost Fluorescent Light : Click to enlarge
Working
The circuit as well as the working is very simple. The oscillations produced by the 2N 3055, SL 100 transistors are given to the primary of the transformer. The two transistors are connected as Darlington pairs. So that supply voltage is get through the R1 resistor via transformer. We can adjust the oscillating frequency thereby brightness of the flurescent tube by adjusting the 1K potentiometer.
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1 comments:
how many 20 watt fluroscent light can be drawn from this circuit ?
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