untitled

3. Place the talking pumpkin on one side of your entryway (just inside, or
   safely out of the rain because these are not waterproof) and place the
   silent pumpkin on the other, with the IR LED facing the IR detector.


4. Flip the on/off switch of the silent pumpkin to On and adjust the
   potentiometer until the talking pumpkin starts talking.


5. Wait for your guests to walk between the pumpkins, and watch them
   scatter in fear (or laugh in delight) when the pumpkins sound off.

Figure 9-28:

The IR

detector

mounted in

the side of

the

pumpkin.

Figure 9-27:

Talking

pumpkin

with

electronics

in place.

212 Part III: Let There Be Light