and the Liquid Wheels can be less
bright on the eyes for back projection.
•
Back projection can also be used for
air effects. Again using back
projection makes the image more
accessible to the person.
• You can make net screens that ha
from the ceiling, but remember people
may want to pull the netting down, so
Velcro can be helpful here.
•
The technique we advise is to screw
two hooks into the ceiling about 4ft to
5ft apart. Then wrap a thin doweling
pole in self-adhesive backed Velcro,
make sure the pole will fit into the
hooks. Put some Velcro onto the top of
the net screen and stick the netting
onto the pole. This will ensure that if
the netting is pulled, it will fall down
without pulling the hooks, pole or
anything else from the ceiling.
•
This idea is not practical if you have a
20ft high ceiling so you may need to
resort to using two cup hooks in
opposite walls and hanging sheets or
nets from string (a little like a washing
Try simply hanging a net between two
strips of netting at varying distance
This idea can be used to great effect
when trying to create depth with the
Deep Effects Wheel (underwater
scene). Make the netting move,
perhaps by using a fan and the fish wil
As you experiment more, you will find
many uses for back projection.
Ideas for Wheels and Cassettes
The 6” Wheels encourage tracking
movements from left to right or right to
left. The rotational movement is
used to turn the wheel. The speed of
the rotator is measured in revolutions
Generally we could recognise the
Balloons or Fireworks Effects Wheels,
however we may not be working with
somebody who interprets the image in
When using the effect wheels think
about how the person or user will
visualise the effect. An example is
balloons: this may be interpreted as a
very bright light with dark images
floating across the screen.
• With the Fireworks Effects whee
colour will appear brighter simply
because they are on a dark
background. So when choosing an
Effects wheel, think about the colours
and the background they will be on.
•
The wheels like Deep and Space may
be useful for scenario work as well as
Using the wheels for scenario and
theme work can make the projector
If using the Deep Effects Wheel you
could have a sea theme for the room
including tactile seaweed and smells of
Wheels like the Dot or Beam can be
used for just simple tracking skills.
•
The Dot effect can be made to change
colour by using a colour Spektraflash
wheel in the front gate of the projector.
You will need two rotators to do this
and we would suggest a 5rpm rotator
with the Spektraflash wheel and a ½
rpm with the Dot Effects wheel.
•
You can use two effects wheels at one
time with two rotators, try a colour
wheel with the Liquid or Fireworks
Effects wheel, the effect is very
different.
Making your own wheels
You can make your own wheel by
purchasing blank wheels
•
Cut circles out of some clear plastic
sheeting the shape of the wheel and
you can use anything that is going to
make a mark on the sheet, for
example you could use overhead
Be careful with overhead projector
children to use. You may also consider
permanent pens for safety.
If you are working with specific visual
skills you can draw defined lines or
simple faces that may help with visual
