Power supply of a fluorescent lamp from a rechargeable battery. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Power supply of a fluorescent lamp from a rechargeable battery. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Lighting

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The power supply circuit of the fluorescent lamp (see figure) is powered by a 12 V battery (emergency power supply).

(click to enlarge)

The current consumption when using a 40-watt lamp from a battery is 280 ... 350 mA. The setting consists in adjusting the frequency of the generator with a variable resistor R2 until the maximum brightness of the lamp glow is obtained (at a frequency above 20 kHz, the "squeak" of the transformer disappears). A fluorescent lamp may also have burnt filaments.

Details. Chip DD1 type K155LA3 (you can also use K155LA4 or K155LN1). Transistor VT1 can be types KT315, KT306, KT3102, KT312, transistor VT2 - types KT805, KT815, KT817, KT819. Zener diode VD1 type KS147 (less desirable KS156). Transformer - sound output from old tube TVs such as TV3-Sh, TV1-9 (turned on "vice versa"). Network transformers also work well, but it is desirable that there are fewer turns in the 6,3 V filament winding.

Author: S.N. Razdobudko

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