Variobot varikabi Manual page 80

10) Search Light
• Searches for a light above him
• Stops under the light
• Turns away of shadow and drives
Circuit: Light Follower / Braking Mode
For this experiment you need a dark room and a lamp
about 30 to 100 cm above varikabi. Ideally, you can also
move the lamp. However, a flashlight is not very suitable
because of its focus.
The more you direct the center sensor upwards, the
further varikabi will move towards the center of the lit
area before it stops. If you hold your hand between
varikabi and the lamp, varikabi will try to return into the
light.
and drives towards it
back into the light