Rather than just giving an off-the-shelf toy gift, I wanted to give my nephews a unique gift that they could put together and (hopefully) enjoy. While the Arduino code for this project may be too difficult for them to understand, the basic concepts of input, output, loops, and conditions used in this code could be explained visually as they play the game of Connect 4.
In this Instructable, I will show you how to put together an Arduino kit that you can assemble and code with your kids to play Connect 4. No soldering is required for this project; just plug and play.
Step 1: Parts
For this project, you will need:
- Arduino Uno or equivalent
- 8×8 Neopixel RGB LED
- 3 button switches
- Jumper wires
- Case – baseboard & cardboard stand
Tools: Screw driver, glue gun
Step 2: Prepare the Neopixel Display Stand Unit
First, connect 3 jumper wires to Neopixel. I’m using the following wiring color code:
White: GND Gray: 5V Purple: Data IN
Then, affix Nelpixel to the display board with hot glue.
Step 3: Prepare the Button Switch Unit
Place button switches on the breadboard and connect jumper wires using the following wiring color code:
Brown: Left Button Red: Left Button Orange: Center Button Yellow: Center Button Green: Right Button Switch Blue: Right Button Switch
Brown, orange, green wires are connected to the (-) rail along with a new black wire.
You may noticed that I’m not using any resistors for these buttons. That’s because I will be using Arduino code to use built-in 20K Arduino pin resistors. See my other project on how to use internal resistors using your code to simply your circuit.
Step 4: Attach Arduino and Battery Holder to Baseboard
Use screws (or hot glue) to attach Arduino and the battery holder to the baseboard.
Step 5: Affix Display Unit to Baseboard
Use hot glue to affix the display unit to the baseboard as shown.
Step 6: Connect Jumper Wires to Arduino
Connect all the jumper wires to Arduino according to the following pin assignment:
Red -> 2 Yellow -> 3 Blue -> 4 Purple -> 5 Black -> GND White -> GND Gray -> 5V
Step 7: Upload Code & Play
I pre-loaded the Arduino with attached code so that as soon as the 9V battery was connected to the Arduino, it started to play the game. The blue buttons are for moving your chip position to left or right column before pressing the yellow button to drop the chip. (See the video)
To enter the demo mode, simply press any button and press & release reset. Once the screen is clear, release the button and you’ll see red and blue playing automatically. You’ll notice that in the demo mode, red and blue players are simply selecting columns randomly and not using any winning strategy to beat the other player.
To exit the demo mode, just reset the Arduino.
I’m planning to add a single player vs Arduino mode in the future so if you know of a basic algorithm for Connect 4, let me know.