Unconventional Switch with a Syringe

 I thought a syringe was an interesting base to make a switch out of. It provides a simple way to engage and disengage the circuit as well as keeps the switch isolated from outside interference. The ends of the connecting wires are unlikely to be disturbed because they are surrounded by plastic. With both ends secured with tape or glue, the circuit ends up being very stable. The plunger of the syringe is just covered in basic aluminum foil which contacts both wires in the syringe chamber. Knowing how many resistors to use was tricky, and I ended up needing to include resistors both in series and in parallel.