Electronic Pocket Operation in an Altoids Tin

Operation. The classic game that everybody has played at some point. It's fun, difficult, and rewarding if you succeed. However, the board is made out of hard plastic, and is pretty big, making it very hard to bring with you to play wherever if you get bored. Enter Altoid Operation, a pocketable version that I invented which can be built in a day. The man's nose still lights up, and a buzzer is hidden under the man that will beep if you mess up. To play, you use the little tweezers to pick out the red pieces.

Supplies

You will need:

An Altoids tin

2 large safety pins-these are purchasable on amazon OR conductive tweezers that fit in an Altoids tin

A 3d printer

A printer preferably with color 4 by 6 photo paper

Conductive paint

An Led

A small buzzer (optional, found on amazon) with a pos and neg

2 Cr 2032 battery

some spare wires

Soldering iron and solder OR some way to connect wires like crimp connectors or even tape

X-acto knife

Some type of glue

Step 1: Print Cut Glue

Since I was making a custom version, I redrew the person in illustrator, with spots for little items to pull out. I recommend printing this on 4 by 6 glossy. Print it out, cut out the shapes on his belly.

3d print all the parts, I recommend using supports for the main piece. Glue the photo you just cut to the flat part of the main piece.

PS

the photo of the 3d print should look different from your print, this was a photo of the original model I had which didn't work.

Step 2: Conductivity and Tweezers

Paint the insides of the holes in the main piece, including the small holes at the bottom of them. On the underside of the main piece, make all of the conductive paint lead to one spot.

Cut down the safety pins so it's just the 2 ends. Solder a wire to this, and put this wire through the hole in the bottom left of the main piece. I recommend gluing the wire to the bottom, so it doesn't move around.

P.S.

I recommend doing at least 3 layers of the paint or more. If not, it might not be consistently conductive. This can affect the loudness of the buzzer.

Step 3: Wiring/Soldering

Put everything in its spot like the photo. In the spot for the 2 batteries, first put a wire going through the hole in the side of it, then put 2 batteries in. Make sure they have the smooth flat side facing upwards. Tape a wire to the top of the 2 batteries as well, and make sure it's only touching the top one.

Follow the pic below if you don't know where to solder