combo lock interface
I've been fascinated with stikfas figures ever since they came out, so I decided to use them as a combo lock. One thing about stikfas figures is they are extremely flexible, so I thought I could use their hands and feet to create a circuit. I wrapped their hands and feet with foil and connected wires to it. You basically create a circuit by making his feet and hands touch each other. The users presses a button and the arduino pulls the circuit to see if it is complete or not. If you have a complete circuit, the green LED lights up (meaning you unlocked the combo), and if not, then the red one lights up. The coding for the project was actually really simple, since it just requires testing if the different parts to the circuit was HIGH.
The biggest obstacle for this project was how to correctly test the circuit. When dealing with dangling wires, there are often numerous ways to complete a circuit, so I had to install LED's in different parts on the breadboard to serve as traffic controller. Since LED's are diodes, they only allow current to go one way. This solve the problem where the users could break the lock just by puts all his feet/hands together. However, there are still a couple of ways to break the combo, and I've yet to figure out how to correctly test it.