For street lighting requires a special, waterproof canopy. However, there is no need to find this shade in stores – you can do it from any glass jars with a screw cap. You only have to cut a hole in the lid for threading to the top of the cartridge and to clamp the cover between its detachable plastic parts. For complete sealing of the lamp need to be laid between the cover and the cartridge with a rubber band.
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“CHARGER” FOR ALL
The proposed device allows you to charge any rechargeable batteries with voltage from 1.2 to 15 V and a nominal capacity of from 0.05 to 20 A·h and can be widely used in radio, car...
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Immediately after his return from Moscow to Koktebel in the fall of 1929 Sergei asked me to do a new airframe for aerobatics, — says the aircraft designer S. N. The lyushin.— There were...