This is fun – gEDA is open source CAD. A toporouter is a mathematically-correct topological router. It’s looks funny, but it’s optimal!

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  1. Kind of looks like the type of point to point wiring that people do instinctively.

  2. Surprise!

    Initially I just want to re-layout Lady Ada’s MiniPOV3 with gEDA and produce 10 numbers of prototypes to give away on 2010 Software Freedom Day Shenzhen.

    *Button and beeper*
    I found that there are several unused pins on the tiny2313, so I add 3 buttons and a beeper, this makes it can be used as a binary or POV cooking timer.

    I also want to add a DS18B20 temp. sensor, but one rule of design is "Simple is better".

    The 3 buttons can be also used to input English words just like the AVR butterfly(But the software was not been implemented).

    The circuit is simple so it is a good opportunity to test pcb’s Toporouter. Finally it works and the layout is very nice. Toporouter is magical! If you change the width of the trace, the layout will be also changed(optimization).

    *POV font*
    As it is a POV toy, so use "POV font" will be fun. This was inspired by Windell’s script font on his business card breakout boards. The font was extracted from HD44780 datasheet and make some modification in inkscape, then convert the postscript file to pcb file with pstoedit.

    Lady Ada, many people include me were inspired by you and your projects. I want to say thank you.

  3. I was gonna say the same thing, it’s reassuringly like the 70’s/early 80’s electronics I’ve hacked.

    ‘Cept Tiny 😉

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