Calculator keyboard design

Calculator keyboard design

The calculator will have a working keyboard, with a layout familiar to anyone who’s ever used a real calculator. When you press a key the display will update in real time. I also wanted to have a selection of common mathematical functions on the calculator keyboard. And most of all I wanted it to be(…)

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More work on digits

More work on digits

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.  

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Update: a working Lego 7 segment display for my calculator!

Update: a working Lego 7 segment display for my calculator!

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(…)

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New project: a Giant Calculator!

New project: a Giant Calculator!

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(…)

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Fun build – Lego Compact clock

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(…)

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Face tracking on EV3 using leJOS 0.9.1

Face tracking on EV3 using leJOS 0.9.1

The leJOS 0.9.1 release added the OpenCV vision processing library. What better way to test it than build a face-detecting robot! First step is to figure out how to use the OpenCV libraries on EV3 to detect a face in an image. It turns out this is really hard to do in practice. Lighting is(…)

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Time-lapse video using EV3 and webcam

Time-lapse video using EV3 and webcam

I wanted to try making a home surveillance project using my webcam and EV3 sending images into Dropbox. But how to put the obvious time and date stamp on the images? It turns out this is really easy to do using the Graphics2D Java class! A short tutorial on how to do this…

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