Step 3
Fix the Logiblocs together
as shown.
Make a recording in the
usual way of what you want
to say to people when they
come into your room – maybe
“ Go away ! ” or “ You are now
entering a secure area ! ”
Hide the Logibloc system you have
made. Remember, if you want, you can
extend the Jack Plug wires just by
joining two other wires on to make
them longer. Make sure you cover the
joins with tape to avoid accidentally
setting the alarm off !
❷
DRAWER GUARD
You can fix up your special
drawer using some aluminium
foil as shown. If the drawer is
opened the aluminium foil will
brush past the two metal
ends of the Jack Plug wires
so completing the circuit and
setting the message off. A
good message would be “ Illegal access detected ! Close the drawer
immediately ! ”
Hide the Logiblocs at the back or beside the drawer where there is usually a
bit of space.
14
