Building a self-balancing robot

This is part of a series of posts covering the development of a self-balancing robot: Modelling an inverted pendulum This post Dertermining the centre of gravity for a self-balancing robot   Previously we investigated how to model an inverted pendulum. It is now time to go ahead and build the actual robot. This robot will […]

Low cost STM32F3 board

If you are looking for a STM32F3 board for your next project it might just be worth your while to consider the SP Racing F3 board. In a previous post I discussed how you can program an old Naze32 flight controller board using Arduino. While writing it I also looked at some other low cost […]

Programming Naze32 with Arduino

The Naze32 is one of those iconic flight controller boards of the early days of FPV quads. It superseded the 8bit boards of the time and was the board to have. Fast forward to today, flight controller firmware has generally become much more complex with support for new features and increased flight performance. This left […]

First steps with ROS

As with many other complex problems, we can often solve and handle robotic problems more effectively if we break them up into smaller pieces. One way to achieve this is by using ROS (Robot Operating System), which promotes a more distributed design approach. The basic idea is that we break the project up into smaller […]

Blob detection and tracking

In an upcoming project I want to experiment with image recognition and have a balance robot track and follow a colored ball. As a prelude to that project and to learn more about what is involved in terms of the image processing I came up with a smaller sub project. The idea is to just […]

E-ink notification and weather display

I love e-ink displays. Their ability to make something digital seem just a little bit analogue intrigues me and I just had to make anything that makes use of one. Like many, many other people on the internet that turned out to be a weather station. The initial aim, seeing as I was already going […]

How to interface a PS2 keyboard

In this post I will discuss some of the basic concepts needed to add PS2 type keyboard support to your next project. For the examples I will be using an Arduino Uno, but the idea is to generally keep the post generic so that it’s also useful on the platform your are using. Physical Interface […]

Going Bare Metal on STM32

During the last couple of months I have started using my Blue Pill boards more often for even the smallest of projects and tests. When using them with STM32duino in the Arduino IDE they are just as easy to program as a normal Arduino UNO. In a previous post I gave more of an introduction […]

High Voltage Arduino Pins

Maybe you have also looked at some Arduino circuits posted online and noticed an interesting way in how some circuits handle high input pin voltages. With high I mean anything above the typical Vcc + 0.5 rating given in the ATMega328p datasheet. Lets look at an example, in a previous post I discussed building a […]

Multi-protocol Module for RC Models

A couple of weeks ago I was searching for a cheap brushed flight controller, for a mini quad project, and stumbled upon the Beecore Lite. At 26mm x 26mm this little guy featured a STM32F030 MCU with MPU6050 IMU and a built in RC radio receiver. All this for less than 10 Euro from a […]