Pencil Alarm Variants

Project Number: 82

OBJECTIVE: To draw an alarm activator.

Description: Remove the jumper connected to point Y (as shown in the drawing) and connect it to point Z instead. Touch the loose ends to the pencil drawing again, the sound is different now. Next, connect a 2-snap wire between points X & Y. Then connect the jumper to either point. Touch the loose ends to the pencil drawing again, you hear a different sound. Now remove the 2-snap wire between X & Y and connect it between X & Z, and connect the jumpers to W & Y. Touch the loose ends to the pencil drawing again, you hear yet another sound. Now you can draw your own shapes and see what kinds of sounds you can make.