Let's Make Robots!

28BYJ-48 stepper motor

hello, I'm working on a new project and I'm using this small stepper motor from yourduino.com. I'm controlling the position of the stepper motor using a 10K potentiometer and it does rotates according to the pot, but it jitters at any position. What could be cousing this jittering?. I tried the knob code from arduino.cc and still jitters. I replaced the pot with a 1.2 kohms fix resistor and it does not jitters when stoped. Is the code missing something? HELP, no really HELP.

#include STEPS 100

Stepper stepper(STEPS,8,10,9,11);

int previous = 0;

void stup ()

where can I get a pair of 2" omniwheels.

Hi, I want to replace the front wheels of the Turtleduino for omniwheels, but I can not find a 2" omniwheels for the turtle. Does anyone knows where to get them? Here is the video of the Turtleduino.


Hi, I'm new to robotics and this forum. I've always wanted to build a robot but did not know where to start, until I stumbled on this site looking for parts for a R/C car and thought it would be a good idea to finally build my firs robot.

So, I got all my gear (tools) together and off I went into my caveman and started building my first robot. I decided to start with a simple obstacles avoiding robot project using the famous Arduino UNO. I'm going to name it The TurtleDuino because if all goes to plans it will look like a turtle.