Richi's blog

Tag: shutter

  • LED debugging the stereowrap hardware

    I found out earlier that 5V is not enough to drive the shutter glasses. With my breadboard setup for stereowrap, I fed 12V to the op amps from an external source. Now that I moved the thing to a strip board, I added a step up converter that generates 12V from the 5V available on the USB port. I used an LT1301 which comes with an application note for exactly my use case. It was easy to implement and worked from the first try.

    Then I temporarily switched from an arduino duemillanove to a leo stick. Although it’s a tiny clone which plugs directly into an USB port, it still seemed like a bit of an overkill. I thought of using one of the AtTiny’s for that project. As I was not too familiar with these yet, I first did a hello world blinking LED’s. Soon after, I learned that neither the Attiny45 nor the AtTiny85 have a hardware UART. Well, I thought, there is an arduino software serial library. Arduino libraries are generally very easy to use in the IDE. But as I programmed the chip directly this time I wanted to stay within CodeBlocks/CMake and use the arduino library from here. (more…)

  • Reviving my vintage 3d shutter glasses

    Many people don’t even know that there were 3d rushes before the one that’s currently fading. In a previous one, some ten years ago, I bought a very expensive ASUS graphics card with shutter glasses. It was really cool for gaming with the 21 inch CRT, but nothing compared to the graphics of today’s games. I still have the glasses, and I wondered many tmes, if I could use them with current equipment. There have been pages on that topic for a long time, but only now I found a page that has all the details to get me interested enough. It features a preload library with which you can hook into the process of switching the image. It has different color schemes as well as sequential for shutter glasses. It uses the V-Sync of the VGA connector to trigger the glasses. But VGA is not so common these days. Luckily, the preload lib is opensource. That allowed me to modify it so as to communicate to an Arduino or orher micro controller through USB FTDI.

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