Daylight battery powered. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Lighting
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The proposed scheme (see figure) is more compact than that given in PA1 / 99 "Denne bright view of the battery." For it, you will need only one empty (it is possible with short circuit, in turns) coil from TS-160 or TS-180. If the circuit does not start well, put a piece of ferrite inside. If the capacitors (0,1uF) get hot, replace them with quality ones that don't leak. If instead of KT808A and similar you use direct conduction transistors, change the polarity of the battery. Any lamps, even burnt ones.
The terminals for the battery can be made from tin nuts for fastening electrolytic capacitors, and the terminals for the lamp can be made from unusable antenna jacks or old vacuum tubes sawn into two eight-pin panels. To increase the brightness, you can increase the capacitance of the capacitors to 0,5 microfarads.
The circuit works fine, the transistors do not heat up even at 15 V! The lower limit is also a good 5-8V (depending on lamp power). I try either 20-watt or 40-watt.
Author: Yu. Borodai
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| Random news from the Archive Electric price tag
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British scientists are developing liquid crystal cells that will greatly facilitate the life of the owners of supermarket chains.
Dr. Tim Spencer from the University of Sheffield says: “Imagine that you are the owner of a thousand stores and you need to change the price of jars of green peas in all stores at the same time. You will need to make a lot of new labels, and besides, no one is safe from error. it's easier if the same thing can be done with the push of a couple of buttons on a single computer.This is where the electrical labels we design come in handy."
The new labels are liquid crystal displays, and they need electricity only when the picture changes. The rest of the time the display shows it without power consumption. The store owner almost does not bear the cost of maintaining electric labels and at the same time gets rid of a mountain of small pieces of paper. Yes, and it is more convenient for buyers - the true information is always reflected on the price tag.
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The energy consumption for creating images will be so small that the battery charge will be enough for a much longer time, "- says Dr. Spencer.
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