Keyboard Prank

by RonDagdag

Published on August 1, 2016

Prank your friends with Littlebits Arduino. Every 15 seconds, this program would press backspace and replace it with a smiley face. Hide it behind the computer or monitor, plug this to the USB port and enjoy! To disable/reprogram, disconnect wire or press the button

WARNING: This program can mess up someone's work. Proceed with caution


Duration: 1

How To Make It


Install the Software Download the Arduino Software to your computer. download the Arduino software from


Download the sketch Run Arduino. Create a new sketch. Copy and paste this code in Arduino IDE. here's the link


Connect the Arduino Connect the micro USB cable into both Arduino Module and a USB port on your computer. Connect the button and the power battery too.


Arduino In the Arduino Program, select your board. Go to Tools > Board > Arduino Leonardo.


Port Next select the serial port that the Arduino will communicate over. Go to "Tools" > "Port" On Mac it would start with /dev/tty.usbmodem.... on PC it will start with COM.


Upload the Sketch To upload the Arduino sketch, press the arrow button in the top left corner of the window. At the bottom, the window will say "Compiling" then followed by "Uploading..." Two yellow lights will flash on your Arduino bit. Upload is complete when you see "Done Uploading", the program will start running right away.


Plug this to any computer Now you can plug this to any computer and the arduino module would be detected as a keyboard. It may mess up somebody's work. Beware.