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Copy file name to clipboardExpand all lines: content/built-in-examples/09.usb/JoystickMouseControl/JoystickMouseControl.md
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- Joystick
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Using the Mouse library, you can controls a computer's onscreen cursor with an Arduino Leonardo, Micro, or Due. This particular example uses a pushbutton to turn on and off mouse control with a joystick.
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Using the Mouse library, you can control a computer's onscreen cursor with an Arduino Leonardo, Micro, or Due. This particular example uses a pushbutton to turn on and off mouse control with a joystick.
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Cursor movement from the Arduino is always relative. So every time the analog input is read, the cursor's position is updated relative to it's current position.
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Cursor movement from the Arduino is always relative. So every time the analog input is read, the cursor's position is updated relative to its current position.
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Two analog inputs ranging from 0 to 1023 are translated to ranges of -12 to 12. The sketch assumes that the joystick resting values are around the middle of the range, but that they vary within a threshold.
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Two analog inputs ranging from 0 to 1023 are translated to ranges of -12 to 12. The sketch assumes that the joystick resting values are around the middle of the range, but that they vary within a threshold.
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The pushbutton allows you to toggle mouse control on and off. As an option you may connect a status LED to pin 5 that lights upwhen the Arduino is controlling the mouse. A second pushbutton may be connected with another 10k ohm pulldown (to GND) resistor to D3 to act as the left click of the mouse.
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**NB: When you use the Mouse.move() command, the Arduino takes over your computer's cursor! To insure you don't lose control of your computer while running a sketch with this function, make sure to set up a controller before you call Mouse.move(). This sketch includes a pushbutton to toggle the mouse control state, so you can turn on and off mouse control.**
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***Note: If you want to add the LED or the extra pushbutton, please follow the guidelines for the [LED circuit](../basics/Blink) and the [button circuit](../digital/Button).***
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***Note: When you use the `Mouse.move()` command, the Arduino takes over your computer's cursor! To insure you don't lose control of your computer while running a sketch with this function, make sure to set up a controller before you call `Mouse.move()`. This sketch includes a pushbutton to toggle the mouse control state, so you can turn on and off mouse control.***
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### Hardware Required
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- Arduino Leonardo, Micro, or Due board
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- 2 axis joystick
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- momentary pushbutton (possibly integrated in the joystick)
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- LED
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- 220 ohm resistor
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- 10k ohm resistor (if needed as pulldown)
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### Circuit
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