Tag Archive: Electronics


RL-DAC

Finally updated RL-DAC after a while.

Although completely useless because of it’s very narrow use. Consider yourself warned 😛 Still, if fiddling with resistor ladder DAC’s your thing (it’s actually not mine), I suppose it might be of some limited use. Beware it also can be somewhat quirky, and it does take a few seconds to start from within the Processing environment (I use processing 1.5.1 running on a dual-core AMD64x2, 2.5 GHz thing with 4 GB RAM, that about covers it I think).

A screenshot:
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Introduction:

Once again, a thread from the Arduino forum, this time the 2-cent DAC thread from forum user “raalst” inspired me to follow up on a thought I got – to utilize the high-Z state of the digital outputs for an increased resolution of a resistor ladder / network type DAC.

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Morse endecoder

Morse EnDecoder

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About:

This is just a little writeup about a Morse code encoder and decoder I made for the Arduino platform. I spotted someone asking for one at the Arduino forum in november 2010, even offering a reward, but alas I was too late for that. No matter, for reasons unknown to me (I’m actually not that into Morse) this is one of many small projects I have been meaning to get around to, but lacking impetus I hadn’t yet done (as with many others). And besides, I would’nt really sell “my” morse decoder anyway. So I gave it away 🙂

Here is the project page on google code, with description of how to use it in your own programs: http://code.google.com/p/morse-endecoder/

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Just an extremely minor update about the Cubeduino.
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Even though I’ve been using KiCad on and off for a year now, I haven’t really made a lot of my own custom components. Basically the built-in have more or less sufficed, and if not there are literally thousands more custom made by other users.

Anyway, here they are, a very few ones. I also try to get the 3D shapes right for these using Wings 3D.
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Acrylic casing!

Acrylic casing!

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Time for a little update regarding my build of the “cubeduino”. I finally got a nice acrylic casing on it.
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Cubeduino

First, I haven’t really blogged before, so this blog is also (hopefully) a work in progress. It will probably look really bad. For starters I have no idea why it is so narrow! Sorry about that!

Also, I absolutely wanted an offline editor on my Linux box for the blog. For the moment that is Bleezer (link at bottom). Doesn’t seem to be supported anymore, but that’s the one I got working-ish. The point about this is that every time I update this blog, the comments disappears… sorry about that too. And I will try not to update it via Bleezer if and when comments appear (Sorry to my brother who has supplied me with a couple of nice comments already!).

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INTRODUCTION

This is about an electronic Rubik’s cube like display thing I’ve made. Except it’s not completely finished yet, but for now I do have a working Rubik’s Revenge (as the Rubik’s cube 4 x 4 x 4 is called) on it. It is based on the Arduino platform using an Atmega 328 microcontroller, lots of RGB LEDs and shiftregisters. I have dabbled a little in electronics and programming from time to time throughout the years, but very periodically.
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