Arduino + 2 servos + mouse by biomech75
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IMG_0791.JPG
Here is a tutorial on how to make 2 servos move with a mouse using the Arduino board.
There is not a simple tutorial than this one and I have search the web looking for one with no result.
This one is simple and easy for everybody to follow. Enjoy! ;)
Dont forget to vote for me on the Arduino Challenge!!

Note: This tutorial is for those who are using the Arduino already. But If you haven't just yet with this tutorial you can.
 
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Step 1: Materials

You will need the following: (not in a particular order)

                    Hardware
1. Arduino Board (my version is UNO).
2. 2 servos Parallax (Radio Shack).
3. Web Cam (optional) to see the movement.
4. 2 rubber bands to hold the Webcam in position.
5. Bread Board to make any connections easy.
6. 1 cable tie
7. Something to hold the servos in place.
8. A computer.                  

                        Software:
1. Arduino Software (to upload the code to move the 2 servos).
2. Process Software (to move the servos using the mouse)
h3nrikoo says: May 15, 2013. 11:30 PM
Thank you so much for the tutorial, it worked perfectly. However, I was trying to change the x-axis servo to a 360 degree servo and it just kept spinning. Can you please help me change the code for Alduino and Processing?
(I would want it to spin from degree 0 to 360 or close, but not all the way around. If this is not possible with the mouse control, is there a way to "convert" the 360 degree servo to a 180 degree servo?)
On forehand thank you!
Danijel0frk says: Apr 11, 2013. 2:35 PM
Played two days with processing and servos. Added some new features to processing interface. Available at http://www.megafileupload.com/en/file/410547/two-servos-key-mouse-rar.html

The BIG plan is to make several servo pairs with lasers/high powered leds, and via FFT library construct light show :)

Big thanks to biomech75!

https://www.youtube.com/watch?feature=player_embedded&v=LyGXzYBQ3gg :)
biomech75 (author) says: May 9, 2013. 8:48 AM
Thanxxx and I am glad that everyone here can use this tutorial to start their own projects...to the outstanding world of Arduino... ;)
Vaibhav1o1 says: Apr 2, 2013. 7:13 AM
Friend this is an awesome tutorial!! and can u plz give me the link to the process software please!!
alexanderall says: Apr 28, 2013. 2:16 AM
http://processing.org/download/
biomech75 (author) says: May 9, 2013. 8:45 AM
Thanxxx alexanderall ;)
Stealth0113 says: Feb 24, 2013. 8:35 AM
This is a very cool sketch! I've sitting here for 10 minutes looking at the pan/tilt-system moving! Thanks biomech75!
biomech75 (author) says: Feb 25, 2013. 7:35 AM
No Problem! This is the basics. Now use your imagination!!!
PiJo says: Apr 5, 2012. 10:20 AM
Hello
I connected the two servos right on schedule. The Arduino software is playing up compile, and upload.
then the Arduino software closed.
Unfortunately I can not move the servo with the mouse.
I use it a Sony VAIO Laptop:

Maybe I can give a tip whoever.
Thank you

biomech75 (author) says: Feb 11, 2013. 11:58 AM
Maybe is the Arduino Software version I have been having issues with the newest version therefore I am using version 0023. Hope this helps ;
biomech75 (author) says: Apr 26, 2012. 9:31 AM
did you open the process software???
after you close the arduino you copy and paste the code to the process software and click run. Then you will see a grey box with the mouse pointer there, move that to start moving the servos
biomech75 (author) says: Apr 25, 2012. 6:33 PM
I was using a laptop and a usb mose during that time hope this help ;)
knazemarek says: Dec 26, 2012. 8:19 AM
please help me.
I would like to control 3 servo by mouse.
I don´t know how to do it.

//Arduino code:
#include

Servo yservo; Servo xservo; Servo zservo; // servos for x and y
//set initial values for x and y
int ypos = 0;
int xpos= 0;
int zpos= 0;

void setup(){
xservo.attach(14); //(analog pin 0) for the x servo
yservo.attach(15); //(analog pin 1) for the y server
zservo.attach(16);

Serial.begin(19200); // 19200 is the rate of communication
Serial.println("Rolling"); // some output for debug purposes.

}

void loop() {
static int v = 0; // value to be sent to the servo (0-180)
if ( Serial.available()) {
char ch = Serial.read(); // read in a character from the serial port and assign to ch
switch(ch) { // switch based on the value of ch
case '0'...'9': // if it's numeric
v = v * 10 + ch - '0';
/*
so if the chars sent are 45x (turn x servo to 45 degs)..
v is the value we want to send to the servo and it is currently 0
The first char (ch) is 4 so
0*10 = 0 + 4 - 0 = 4;
Second char is 4;
4*10 = 40 + 5 = 45 - 0 = 45;
Third char is not a number(0-9) so we drop through...
*/
break;
case 'x': // if it's x
/*
....and land here
where we send the value of v which is now 45 to the x servo
and then reset v to 0
*/
xservo.write(v);
v = 0;
break;
case 'y':
yservo.write(v);
v = 0;
zservo.write(v);
v = 0;
break;

}
}
}

//Processing code:
import processing.serial.*;

int xpos=90; // set x servo's value to mid point (0-180);
int ypos=90; // and the same here
int zpos=90;
Serial port; // The serial port we will be using

void setup()
{
size(360, 360);
frameRate(100);
println(Serial.list()); // List COM-ports
//select second com-port from the list (COM3 for my device)
// You will want to change the [1] to select the correct device
// Remember the list starts at [0] for the first option.
port = new Serial(this, Serial.list()[0], 19200);
}

void draw()
{
fill(175);
rect(0,0,360,360);
fill(255,0,0); //rgb value so RED
rect(180, 175, mouseX-180, 10); //xpos, ypos, width, height
fill(0,255,0); // and GREEN
rect(175, 180, 10, mouseY-180);
update(mouseX, mouseY );
}

void update(int x, int y)
{
//Calculate servo postion from mouseX
xpos= x/2;
ypos = y/2;
zpos = y/2;
//Output the servo position ( from 0 to 180)
port.write(xpos+"x");
port.write(ypos+"y");
port.write(zpos+"y");
}

thank for response.
biomech75 (author) says: Feb 11, 2013. 11:46 AM
here is the code with some changes (I have not test this code) Let me know if it is working if not I will run some test again ;)
CODE:

//Arduino code:
#include

Servo yservo; Servo xservo; Servo zservo; // servos for x and y
//set initial values for x and y
int ypos = 0;
int xpos= 0;
int zpos= 0;

void setup(){
xservo.attach(14); //(analog pin 0) for the x servo
yservo.attach(15); //(analog pin 1) for the y servo
zservo.attach(16); //(analog pin 2) for the z servo

Serial.begin(19200); // 19200 is the rate of communication
Serial.println("Rolling"); // some output for debug purposes.

}

void loop() {
static int v = 0; // value to be sent to the servo (0-180)
if ( Serial.available()) {
char ch = Serial.read(); // read in a character from the serial port and assign to ch
switch(ch) { // switch based on the value of ch
case '0'...'9': // if it's numeric
v = v * 10 + ch - '0';
/*
so if the chars sent are 45x (turn x servo to 45 degs)..
v is the value we want to send to the servo and it is currently 0
The first char (ch) is 4 so
0*10 = 0 + 4 - 0 = 4;
Second char is 4;
4*10 = 40 + 5 = 45 - 0 = 45;
Third char is not a number(0-9) so we drop through...
*/
break;
case 'x': // if it's x
/*
....and land here
where we send the value of v which is now 45 to the x servo
and then reset v to 0
*/
xservo.write(v);
v = 0;
break;
case 'y':
yservo.write(v);
v = 0;
break;
case 'z':
zservo.write(v);
v = 0;
break;

}
}
}

//Processing code:
import processing.serial.*;

int xpos=90; // set x servo's value to mid point (0-180);
int ypos=90; // and the same here
int zpos=90; // and the same here
Serial port; // The serial port we will be using

void setup()
{
size(360, 360);
frameRate(100);
println(Serial.list()); // List COM-ports
//select second com-port from the list (COM3 for my device)
// You will want to change the [1] to select the correct device
// Remember the list starts at [0] for the first option.
port = new Serial(this, Serial.list()[0], 19200);
}

void draw()
{
fill(175);
rect(0,0,360,360);
fill(255,0,0); //rgb value so RED
rect(180, 175, mouseX-180, 10); //xpos, ypos, width, height
fill(0,255,0); // and GREEN
rect(175, 180, 10, mouseY-180);
update(mouseX, mouseY );
}

void update(int x, int y)
{
//Calculate servo postion from mouseX
xpos= x/2;
ypos = y/2;
zpos = y/3;
//Output the servo position ( from 0 to 180)
port.write(xpos+"x");
port.write(ypos+"y");
port.write(zpos+"y");
}
bboudreau says: Dec 23, 2012. 9:56 PM
Just followed your instructable. Great job. I was scribbling all over a peice of cardboard within 10 minutes.

Thank you for sharing.
madc2012 says: Sep 3, 2012. 3:41 PM
Hey very nice tutorial!!
from start to finish it took me about 5 min and everything works great!!!
biomech75 (author) says: Sep 17, 2012. 6:58 AM
Thank you! I'm glad you like it.
AntonioLopez says: Apr 16, 2012. 8:53 AM
I left you a comment on your other tutorial - (http://www.instructables.com/id/Arduino-2-Servos-Thumbstick-joystick/), I need to ask the same question. How can I do this with two small dc motors, servos a very noisy and my camera will pick up noise.

Here's a link to the dc motor I'm using,

http://www.servocity.com/html/90_rpm_micro_gearmotorblocks.html

Thanks........Antonio
biomech75 (author) says: Apr 26, 2012. 9:27 AM
For DC motors its different. You will need :( This is a test code try and tell us how does this work).
a dc motor
a transistor (NPN 2N2222) @ RadioShack
a resistor (1K Ohm) @ RadioShack
a diode @ RadioShack

Code:
int potpin = A0;
int val;

void setup() {}

void loop() {
val = analogRead(potpin);
val = map(val, 0, 1023, 0, 225);
analogWrite(3, val);
delay(15);
}

dc motor.png
Oysteinkn says: Apr 23, 2012. 11:18 AM
Hi!
What would I have to do to invert the axis? ie. make moving the mouse left turn the servo in the opposite direction of what it does now.

Thanks! :D
Oysteinkn says: Apr 23, 2012. 12:17 PM
I figured it out :)

Had to change "xservo.write(v)" to "xservo.write(-1*v+180)", and the same for yservo.

By the way, nice tutorial!
biomech75 (author) says: Mar 8, 2012. 4:18 AM
my mistake ....serial port Thnax for the correction
pro2xy says: Mar 8, 2012. 3:38 AM
are you sure you change the number to change window size.....? I thought it was to change the serial port
David97 says: Mar 7, 2012. 12:57 AM
Very nice, I thought of connecting it with a x-bee and bluetooth modem to a computer and then mounting it on a rc car.
biomech75 (author) says: Mar 7, 2012. 8:06 PM
great idea!!
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