In small towns and villages of young aquarists are faced with the same problem — nowhere to get equipment for aquarium: pet stores do not. But everywhere there are fotootdela, and and them the red light. But why fish red glass? If it is removed — get a reflector it extra light will give to the development of aquatic vegetation, and heated water — is enough to put fototovari without glass on the cover glass of the aquarium.
A. BELONOZHKO, Kiev
Recommend to read
WOOD SMITH
Living in the age of technological progress, a wide range of machines and tools, we sometimes underestimate the technical ingenuity of our ancestors. Meanwhile, they used mechanisms and...
Electronic ignition for “Voskhod”
In the second issue of "M-K" for 1976, I read an article "Electronics on a Motorcycle" about an electronic ignition system. It has a DC to AC voltage converter. This circuit requires a...
