LET’S GET CONNECTED
As you have seen we can use light to trigger the Playback of messages
automatically. This section shows you how to make Alarm systems that
trigger your pre-recorded messages using the Jack Plug and IN bloc.
❶
DOOR ALARM
You will need a small strip of aluminium foil and some sticky tape.
Step 1
Take the Jack Plug wires and
place them near the bottom of
the door surround with their
ends sticking out so that the
door will brush past them when
it is opened. Stick the wires
on with sticky tape.
Stick your “Alarmed” sticker on the door to tell people that you are alarmed !
Don’t forget to disconnect the BATTERY BOX when you are not using the
Logiblocs to make the batteries last as long as possible !
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Step 2
Shape a strip of aluminium foil
around the edge of the door
itself, at the height of the two
wires. When the door opens,
the aluminium foil will touch
both wires which should trigger
the Logiblocs into action. This
is called completing the circuit.
