Some work in progress to cover up the internals of the digit mechanism with plates to only show the segment faces through. Not perfect yet. I need to make the frame more robust and come up with a clean modular way to cover up the face of each digit.
An exciting update on my Giant Lego Calculator project; I’ve succeeded in making a 7 segment display unit count upwards and also attached keys that change the value on the digit when you press them. This is a huge step forward after a lot of failed prototypes! Watch it in action In this first video(…)
My latest project is to build a giant working calculator out of Lego. This is by far the most ambitious project I’ve taken on, and I’ll be blogging about my progress over the coming months. Why do I call it a ‘giant’ calculator? Because it’s going to be BIG! I estimate it’s at least one metre(…)
This was a fun build I did over a weekend. I wanted a little challenge to tackle, something new I hadn’t tried before. I really like Nathanael Kuipers supercars, which he posts on his new website http://www.nkubate.com. But I also noticed he had a design for a compact LEGO clock. What appealed to me was the(…)
In this little project I use a serial LCD connected to the Rasp Pi serial output to print the current time and IP address for the Pi. It’s a fun little project as it puts together a few pieces; using the Adafruit T-Cobbler Plus, making an inverter circuit and controlling the serial LCD.
Here’s a quick tutorial to add Dropbox support into a Java program in leJOS 0.9.0. It turned out to be far easier than I thought! Read on to discover how you can easily upload and download files to and from your Dropbox account from the EV3 in leJOS. Dropbox? On the EV3? The first thing(…)
A blog reader asked if I had created building instructions for my Lego EV3 Space Invaders model. Unfortunately I never did create them before taking the model apart. But I did the next best thing; I took pictures as I took it apart! The Space Invaders model is broken down into 3 modules; the coin(…)
Space Invaders! The classic arcade game is back, and this time built using a single Lego Mindstorms EV3 kit. I decide to write this game in leJOS using the 0.8.1-beta release (see the leJOS wiki for more on getting it installed). I contemplated writing it in the EV3 graphical language but the thought of coding(…)
This program that allows you to control a robot over the internet (or at least your home wifi) from a web browser. The EV3 leJOS 0.5.0 release makes it trivial to write internet-aware programs on the EV3 as it supports the full Java networking library. I used the NanoHTTPD Java class which packages a simple(…)
This fun little robot is a test bed to see if the Mindsensors PFMate and SumoEyes will work with leJOS on the EV3. Good news is that both sensors work perfectly with the current 0.5.0-alpha build of leJOS! The Mindsensors PFMate allows you to control Lego Technic Power Functions Motors by sending IR commands to(…)