Category Archives: DIY

Vectorize an image using Inkscape

And now, for something completely different.

For a coming event we want to use logos from different bars and cafes around the block. The idea is to do a little of propaganda: banners, t-shirts, mugs all the way!

Some bars have their fancy logos already as a vector image. Other ones don’t even have a computer where the logo is stored.

In this post we’ll see how to create a vector file from a pixmap (jpg, png, whatever raster format that Inkscape can open). With a couple of examples, a graceful one and a crazy one.

There’s a lot of manuals online for this, an in-depth one with good examples can be found in Tavmjong Bah’s website.

vectorizing!

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Filed under DIY, tools

A 3×3 font for Led Matrices

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For the clock project I require text to appear in a small container, that is 4×4.

Since in this 4×4 I have to add vertical and horizontal spacing this ends with a 3×3 font.

Never in my life I designed a font, and if you check my hand writing… it is horrible. Luckily 3×3 only leads up to 2^9 options, 512 different characters, and I believed I could handle this.

After writing the font in a squared notebook, I checked that other fronts already exist, and, unsurprisingly they were very similar to mine.

Show me your font

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Filed under code, curious, DIY

Arduino Clock wiring

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Before any soldering or programming happens at all, I’ll need to have a general idea of what connects where.

This post presents the schematic for the Secret Santa Clock and a quick explanation of each “module” of the system. Everything from a bird’s-eye perspective that is enough for you to reproduce it.

show me the schematics

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Filed under DIY, electronic

Arduino Clock Project (Overview)

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Back in business, I am alive and well, and working in an embedded software company.

For Christmas we play “secret Santa” with my family, and this year I was going to take the crown home with me. We only have one rule, and this is: “you have to do it yourself”.

I had some spare parts from past projects (or tinkering) and a rough idea of what to do: a calendar clock. And here we have the first post describing how I created the clock.

This post is just the overall design. Kind of an overview of what the clock will do, for more “meaty” content stay tuned, I plan on writing posts about each aspect:

  • Wiring the DIY clock.
  • A 3×3 font for LED matrix displays.
  • Programming the DIY clock.
  • Arduino and tinyRTC
  • Arduino and 4 led matrices
  • Arduino clock software
  • Casing the DIY clock.
  • As you can see, I am mostly software oriented (as usual :-D)

    check out the design overview

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    Filed under DIY, electronic