Category Archives: Electronics

GPS navigation robot – Two waypoints

This video shows a robot I have built that is driving between two waypoints using GPS.

I built this robot last summer, about a year ago. Back then, I never really managed to the software part of the robot working. The weather became worse outside as the fall came, and a lost interest in this project and started working on other things instead.

I wave written all the code myself, apart from the functions used to calculate course and distance between GPS waypoints. I used functions from the TinyGPS library for that. The code runs on an Arduino Due, the robot is using PID control to steer towards the waypoints. The robot uses a combination of GPS-course and integrating the signal from a yaw-gyro to determine its current course. The robot also has a compass, but it does not seem to work very reliably, therefore I do not use it. The robot also has sonar and other sensors, but they are not used in this video. Expect more videos and info about this robot in the near future.

New robot project

This is a new long-term robot project I have been working on for the past couple of months. It is a general purpose indoor robot, that will work as a platform for experimentation. When designing this robot, I have tried to think about and improve everything I have learned from previous robot projects I have made. But this robot will also feature some new stuff I have not tried before. Some of the key features if the robot includes:

  • Stepper motor based four-wheel-drive skid-steering drive system
  • Big Li-Ion battery
  • A lot of custom 3D printed parts
  • Heavy duty bumpers, large ground clearance and large foam wheels
  • Raspberry Pi main computer
  • Arduino Due for controlling low-level peripherals
  • Scanning Lidar sensor
  • Probably a Raspberry Pi camera module mounted on a pan/tilt system

So far, only the majority of the mechanical work is done. Here are a few images, click on them to make them larger:

DIY 3D printer detailed overview

This video is a detailed overview of my DIY coreXY 3D printer. It is just over a year since I built it. Some things have changed since then, but most of the machine it the same. This is my first and only 3D printer, I use a few times a week, sometimes more often than that. The printer works very well, it produces high-quality parts while requiring very little maintenance.

Link to 3D printer page: DIY 3D printer

Obstacle avoidance robot

This is my attempt at building a really good obstacle avoidance robot. The robot is built to drive around a normal indoor environment without getting stuck on stuff. The robot uses an Arduino Maga 2560 and several sonar sensors to detect obstacles.

This robot also has a Raspberry Pi and camera module, that will be used for computer vision experiments in the future.

More info about this robot on the obstacle avoidance robot page