Instructions

Game and Knowledge in Electronics-Lab
24
You can seemingly freeze fast movements
with short flashes of light. If the flashes occur
fast one after another, the same movement
will be visible in successive moments. Start
the programme D-H. This time, all three
colours of the colour LED are switched on
at the same time to create white light. You
are already familiar with the corresponding
connections at the micro-controller. You can
change the speed with the knob.
Watch different movements under the light of
your stroboscope. Investigate falling drops
of water in the bathroom. It needs to be
completely dark, so that your stroboscope is
the only source of light.
A stroboscope
20
If you have a motor or, even
better, a fan with a propeller,
you can watch it in the light of
the stroboscope. Slowly turn the
knob until the propeller appears
to be rotating only slowly or
standing still. You may have
seen this in films. The wheels
of a moving car appear to
become slower and slower
and then even appear to rotate
backwards. This effect is created
when a movement is split up into
individual images. The same
happens with your stroboscope.
4.5v
TC3
R
G
B
TC4
TC1
TC2