High-voltage power supply circuit for fluorescent light

Figure 1

The following figure shows a diagram of power fluorescent lights to a normal battery. It is very convenient when you can not use the grid.

Principle of operation

This scheme is a voltage converter for the type of blocking oscillator. Excitation it is because of feedback between the collector and base of the transistor circuits through respective windings of the transformer. Resistor R1 sets the mode of operation of the transistor.

After turning on the switch SA1 in the upper side of the transformer there is a pulsed high voltage supplied to the fluorescent tube. Under the influence of impact ionization of the gas lamp begins to glow. And the glow will even burned-out bulb with a filament (or filaments) pitch, but the capacity of not more than 20 watts, and not too worn.

Device

Transformer – TVS-110LA line of black and white TV. It will have to modify: disassemble, remove the high voltage winding and socket kenotron, and that transformer is not “food”, before assembly to lubricate the ends of the magnetic glue. Transistor – almost any powerful silicon structures np-n, or pn-p. The latest version will have to change the polarity of the capacitor and battery. Transistor must be secured to a heat sink with a surface area of 30 … 50 cm 2 or pressed to the aluminum plate transformer with staples.

The battery can be made up of four to six primary cells 373 for a version of the tourism campaign. In the case of a road trip or a summer conditions must apply a car or motorcycle battery. Then we can do without the capacitor.

R1-4, 3 to

C1-16b-500mkF

VT1-KT805A

Converter begins to work almost immediately after startup. The desired brightness of the lamps installed by selecting the resistor. However, excessively reduce the resistance for more brightness does not make sense, since the increased current consumption from the power source. This is especially true version of the transmitter supply from the battery of electrochemical cells.

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