All flashlights have a reflector giving a wide enough beam of light. But if you want a point — for example, the light pointer of the lecturer? Narrow beam, as if from hidden lamps in detective films, will Give a simple nozzle. For its production will need a plastic Cup suitable diameter and lens from diascope to view the slides. In the bottom of the Cup making the hole, on which the acetone is glued to the plastic rim of the eyepiece.
Recommend to read
WORKING SLED
As soon as the first snow fell, it became clear that the house has no need of such cargo winter vehicle as a sled. Child's sled for a long time "went" on a well-deserved rest in a pile...
WITH ELEKTROLETA ON A WALK
Speed, racing, training, training, flight, control line, radio control room - which only the definitions used to describe the purpose and characteristics of a particular flying...
