12
PLAYING WITH SHADOWS
This section gives you some ideas about the way you can make your Spy Kit
playback automatically using Shadow Activation.
❶
THE LOGIGUARD
First make the circuit shown and
lay it down on a flat surface.
Put the switch into the Record
●
position and record the words “ Give
that back ! ” in your loudest voice.
Move the switch to Play
➤
and press the
BUTTON again to check that your
recording is OK.
Now replace the BUTTON with the LIGHT
SWITCH. Make sure there is enough light shining
down onto the LIGHT SWITCH to activate the
playback.
Now cover over the LIGHT SWITCH with
the loose IN block. The light should go off.
If anyone tries to take the IN block away the
Logiguard will tell them to “ Give that back ! ”
❷
SHADOW SURPRISES
Place the same blocks upright so that as people
pass by, their shadow first switches the
Playback off and then on.
Make up messages to surprise your friends
as they walk pass – but not too rude in
case the wrong person walks by !
How about setting up the blocks to say
“ Good Morning ” or “ Good Night ”
when the sun comes up, or your
bedroom light is turned off.
