Quick n' Easy Halloween Pressure Plate

Step 3 Attach the two plates/Testing

Now, simply glue the plates together, via the sponges. (Aluminum foil on the inside) You're ready to test it out!

Testing:

Attach one pole of the battery directly to what you're testing on, for the other pole, attach one wire of the pressure plate to the battery, and the other to what you're testing on. Push down on the plate and hope it works!

If it doesn't

Check your connections, do both wires actually touch the contacts of the battery? Do both wires actually touch the contacts on your test subject? Are both wires touching the aluminum foil? Do the foil balls touch each other when the plates are compressed?

If it doesn't stop working

Check and make sure that the aluminum foil balls are constantly touching each other, that's most likely. If that doesn't work, add just a little bit of water onto the sponge, squeeze the sponges to work it in...that should make it a little bit springier.

Have fun!

(I had a video, but you can't tell when the motor is spinning...I'll try and get a better demonstration soon)