Hobbyists and modelers know how hard it is without a special container to connect several dry cells “373” in the battery. Reliable and easy temporary container is obtained from the segment of old Bicycle inner tube. Its length must be equal to the total height of all elements (see figure). The first element of push to the middle of the tube, and then both sides stick to it other sources of supply.
A. KUPRIYANOV, a pupil of the 7th CL., g. Omsk
Recommend to read
IN THE CAR THERE ARE NO SMALL THINGS
The importance of the correct operation of electrical equipment, of course, indisputable. About how to improve its reliability, described in the thematic selection prepared by...
NEW SKILLS DRILLS
The tinkerers are offered interesting options for upgrading ordinary electric drill, which introduced its readers the magazine "Practic" (GDR). Due to the small additions, it becomes a...
