Monthly Archives: January 2012

Ultimate LED Nerd Glasses: Part 3 – Mechanical and PCB Construction

Wnerd glasses with LEDs on it with no tapehen building something like this, the first question I ask myself is “how can I avoid making the wires into a rat’s nest?”  OK, maybe that’s not true if you look back at such projects as the Pegleg Hexapod or Boxie the Creepster.  However, this was a wearable hack and has a very limited space to work with, so wires going everywhere on one’s forehead wasn’t really what I had in mind.

Instead of wires running everywhere, I decided to make my own CNC-routed PCB.  What it amounts to is three separate lines of copper cut to approximately fit the bridge section of the glases in question.  I measured everything and used Draftsight (see my Windows DS review) to draw the approximate shape with lines separating it into three isolated sections.  The middle will act as ground and the top and bottom section act as the positive for each set of LEDs.  It turned out better than I expected, and is mostly covered by the glasses.

From Amazon: Nerd Glasses Buddy Wayfarer Black Frame Clear Lens

I have no idea what brand or make the glasses that I used were, but I’ve listed a link above to some that are similarly styled from Amazon.  I’ve also listed Read more »

A Review of Draftsight for Ubuntu Linux

Update 2/9/2012: If you’re having trouble downloading Ubuntu Draftsight, here’s a solution.

Update 2/5/2012: It seems that both the relative placement problems as well as the lack of being able to turn off the “CCS icon” and origin have been fixed!  After some weird error, I removed the software and re-downloaded and installed Draftsight on my Ubuntu machine.  After allowing a file to be updated per a prompt, things seem to be working perfectly (at least for these issues)!  Thanks Dassault Systemes! (FYI, I had to download and install this manually using the terminal; it didn’t appear to be available on the Ubuntu Software Center).

The last time I reviewed Draftsight, it was the Windows version (my review here).  With my recent conversion to the Ubuntu OS, I was quite happy that Draftsight (Download it here) was available.  While away from work (and ProE), I do, obviously if you’ve ever seen this blog before, work on other projects.  Generally they’re simple enough for 2D CAD – Draftsight in my case.  With it’s ability to handle DXF files it really fits the bill when I’m trying to generate a drawing to send to my CAM software and have routed.

Draftsight for Ubuntu screenshot

Draftsight for Ubuntu. Looks kind of like AutoCAD.  Here’s a design for something that I’ll post about soon…

To preface everything, let me first say that it’s really great that Dassault Systemes decided to put out their CAD package for Ubuntu as well as Windows and Macintosh.  Seriously, that’s pretty uncommon.  As with the Windows version, the text commands are very close to AutoCAD, and, if you’re used to that package, the switch is pretty painless.

Painless, that is, until Read more »

Ultimate LED Nerd Glasses: Part 2 – Electrical Circuit and Hookup

LED nerd glasses circuitTo the right is the schematic used to construct the LED nerd glasses (see the results here).  The rectangular square piece in the middle of the LEDs represents the PCB.  The middle acts as a neutral, and the sides each provide 3 volts when connected.

The 3 volt coin cell battery (Energizer 2032) that I used should really have a 33 Ohm resistor connected (see LEDcalc.com to easily calculate this) before going into each 3 volt bus.  I’ve neglected this in my design, so the LEDs will be overpowered and will most likely burn out prematurely.  Also an actual switch and battery holder would be a nice touch.  As it stands now, the neutral is held onto the battery with electrical tape and the positive or signal wires are tapped onto positive by hand.

From Amazon: Energizer Lithium Coin Watch Battery 2032, 2-Count

The circuit itself is very simple, but Read more »