Introduction: Number Game Power Switch

So, I thought it would be cool to turn one of those simple little number grid games into a power switch, which would turn on the surrounding LEDs when you "win" the game.

Materials used:

8 - 3mm 3V LEDs
1/4" wood base
22gauge wire (red and black)
$0.20 number puzzle (took awhile, but can be found at most party stores in the prizes section).
conductive paint

Tools used:

Band saw
Hammer
Screwdriver
Soldering iron
wire cutter/stripper
Sandpaper

Step 1:

The first step in the process was to remove the backside of the number game, leaving just the front side to hold all of the pieces inside.

Then the back side of the tiles were painted with the conductive paint. The inside of the red frame was coated with the conductive paint where the 1 and 15 tiles would be also. At the same time, I drilled two 1/16th inch holes in the wood where the number 1 and 15 tiles would be when they were all in order. The 8 holes along the edge of the wood base for the LEDs were drilled at this time as well.

Step 2:

Next came the design of the circuit and the soldering of the wires together. The first wires I did were for the 1 and 15 tiles. These I placed through the holes and then melted solder in and around the holes to keep them from moving anywhere.

After that, the LEDs were placed in the holes. I bent the positive wires down to both hold the LEDs in the holes while i was working and to distinguish the two wires for each one, so that I wouldn't solder the wrong wires together.

I decided to run all of the LEDs parallel with a 3V power source because that is what they're rated and they would not light up as well if run in a series with the same power source. To have them all running parallel, I merely soldered all of the positive wires from the LEDs together (red wires) and connected them to the power source. Then, all of the negative wires were connected and went through the number game 'switch' and then that connects to the negative side of the power source.

Step 3: Final Step

The final step was to glue the red frame of the game to the wood base so that the conductive paint lined up with the soldered wires sticking out of the two holes. Then the tiles could be placed inside the frame.

As you can see from the pictures, the LEDs won't light up until you have the tiles in the correct order. You can also see a bit of the conductive paint where the 15 tile should go.

Comments

author
Zovits (author)2010-01-31

It seems that the LEDs will light up even if you have any of the 3-4-8-9-13-14 numbers mixed up, since they do not participate in conducting.
Maybe a pattern could be thought up and painted on the backsides of the tiles and the base board, where only the correct solution provides a closed circuit.

So on the completed game board the metallic paint would make a wavy path, going under all of the tiles. The path would consist of types, the board would have markings that provide connections between the individual tiles, entering and exiting the tile's space at different "heights" in order to prevent a non-fitting tile from closing the circuit. And each tile would have an unique pattern on it's underside that would only make a connection between the board's markings if the tile is on the correct spot.

author
BoredRobot2703 (author)2009-10-26

 With much more complicated circuitry and a random number order this wud make an AMAZING combinaion lock

author
berky93 (author)2009-08-14

what if you made it so 1 and 15 have conductive pain on the bottom that touch the wires, and the rest of the pieces also have cnnductive paint to connect them. but the paint in the side of each piece is in a different spot so it only connects from 1>2 and 2>3 and 3>4 etc. etc.

author
black360ninja (author)berky932009-08-15

Yeah, I thought about doing exactly that. It was rather difficult to work with the size and low quality of the plastic toy i used for this. If I re-did this one, I was thinking of doing it in wood and using metal wires and pads at different places on each square as you suggest, so that only the real solution would set off the lights. Overall, better quality materials :) Also, a note on the conductive paint, it didn't work as well as I was hoping. It had to be touching really well to conduct across all of the tiles on this project. It's probably because it had to jump surfaces 8~9 times. It also rubs off after awhile of moving tiles around. My original plan was to just use solder across the backs of the tiles. It just melted right through the plastic tiles, lol.

author
campingfreak (author)2008-09-16

this could be easily modifyed so that the first four number have to be in the right spot but not 1234 3678 1245 9101112 13 145

author
mikeasaurus (author)2008-09-16

pretty cool idea, and a working concept; I like it!

It would be neat to see more traditional board games revamped to use this idea. With a little more work this instructable would have been perfect for the 'invent a sport' contest.
(https://www.instructables.com/contest/inventasport/)

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