Author: lentzwc

Now, start putting the box together. We’ll start with the top and sides A, B, and C. This will leave side D and the bottom open for putting the motor in. Screw A, B, and C together. Through side D, go ahead and fit the motor in and mount it with the machine screws. Now, you can put the bottom on, but leave side D completely open for wiring.

Now, let’s take a look at the Arduino Uno. It’s time to wire this thing up! We’re going to do this in two stages. First, we’ll wire the WiiChuck to the breadboard, then we’ll wire the motor to the breadboard and power supply and tuck it all away.

First, wire your breadboard to the 5V and ground. Run 5V to the positive (+) column and GND to the negative (-) column.

Now solder 4 male header pins directly into the WiiChuck adapter and then just stick it into the breadboard. Once you’ve done that, all your wiring can come and go from the breadboard. You’ll connect C to Analog input pin 5 and D to analog input pin 4. Then you’ll connect “+” to positive on your breadboard, and “-” to negative on your breadboard.

Running everything through the breadboard instead of direct to pins will allow you to easily introduce servos or other things into the system without having to start over later if you want to add some functions to the Nunchuck, or just use it for something different altogether.

For the motor, because you don’t need power from the uno, you can wire directly to the pins you need. In our code, we’re using pin 9 to control the motor through the nunchuck, so we’ll plug directly to pin 9. And we’ll plug our negative directly to ground.

Now, before you do this completely, you’ll need to check the polarity of your motor, because once you introduce the transistor and diode, the current becomes directional. And you can’t just switch positive and negative to run the motor the other way. It will cause really heavy amperage draw at low voltage.

So, let’s wire up the power supply. Using a standard replacement cable from the hardware store, it should have standard coloration. Green for GND, White for Neutral, and Black for Live. Please consult your packaging or a reliable internet source if this coloration is not the case.

First: DO NOT PLUG ANYTHING IN — Always make sure everything is turned off before adjusting wiring on any electronics.

2nd: Make sure the switch on the side is set to 115V. It should be easily adjustable with a toothpick.

3rd: Connect green to GND, white to N, and black to L.

4th: Connect to a surge protected power strip that’s plugged into the wall, but turned off. Then turn on the power strip. The green light should come on. This means the supply is functioning correctly.

Now, if you’ve got a multimeter, which you should probably have if you’re doing any kind of power related wiring, you can touch red to positive and black to negative to get a reading. It may not read exactly 12V. If not, you can use a phillips head screw driver or similar tool to adjust a little dial next to the green light. Adjusting that dial will “dial” in the voltage to the desired 12V.

Remember why we did this now? So we can check the polarity of the motor. You want the motor to spin clockwise. So connect it up to the power supply and see which orientation matches clockwise. Screw it in as if you’re wiring it permanently, don’t just touch it to the supply. Then flip it on. If you need to wire it positive to negative and negative to positive in order to get the correct direction of rotation, you’ll need to switch that around when you read the diagram to wire it to the Arduino. If for some reason your motor does need to run “backwards” all you ned to do is flip the wires before you get to the diode in the diagram. Connect red to the black end of the diode and black to the silver end of the diode. Do not change the color orientation after the diode. This way, you’re always wiring red to positive on the power supply and black to negative on the power supply.

Before everything gets buttoned up, the code needs to go into the UNO. I based my work on a set of code for a nunchuck controlled rubber band gun that ran three servos. Eventually, this disc shooter will function on multiple axes.

First, you’ll need to have a few libraries. Two of them should already be available in your Arduino programming on your computer. Those are Servo.h and Wire.h. They’ll already be in your libraries list. The one you’ll have to add is attached to this instructable. It’s called nunchuck_funcs.h

You’ll need to add an actual folder for it into your libraries folder. On a mac, you can unzip the file right into your libraries folder: documents > arduino > libraries.

I’m giving you the file, because the versions out online lack the correct syntax. They haven’t been updated it some time, and many of the sites where these files originated are gone.

From there, just copy and paste this code into your Arduino window! This code has potential to allow you to do much more than just fire up the motor. But that overcomplicates things for what this prototype is trying to do. I’ll add more later.

[code]

#include #include #include "nunchuck_funcs.h"

int loopCnt = 0; int bang = 9;

Servo LR; //servo for Left-Right movement Servo UD; //servo for Up-Down movement

byte accX, accY, joyX, joyY, zbut, cbut;

void setup() { UD.attach(10); pinMode(bang, OUTPUT);

Serial.begin(19200); nunchuck_setpowerpins(); nunchuck_init(); Serial.print("WiiChuck: Let’s Do This!!!\n"); delay(100); }

void loop(){

if (loopCnt > 200) { loopCnt = 0;

nunchuck_get_data();

zbut = nunchuck_zbutton(); cbut = nunchuck_cbutton(); joyX = nunchuck_joyx(); joyY = nunchuck_joyy(); accX = nunchuck_accelx(); accY = nunchuck_accely();

if (zbut == HIGH) {digitalWrite(bang, HIGH);}

else {digitalWrite (bang, LOW);}

}

loopCnt++; }

[/code]

Now, you can hook the power supply back up and test your nunchuck control of the motor. It should only power on when you press the Z button.