Tag Archives: pcb

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Slices of a clock

There are so many ways to tell the time. DIYers have been doing clocks since the Ancient Egypt (obelisks lacked portability, thou). Every modern maker has a clock amongst her first projects. I have done some myself, including a fibonacci clock, a wordclock with a fancy green matrix effect and an unreleased project that hopefully will see the light someday soon.

But recently I came back to the idea behind the wordclock before, to extend it in different ways:

  • Replace the ATMega328P with an ESP8266 (NTP support and user interaction)
  • Smaller sizes (8×8 LED matrices)
  • Smaller PCB, less buttons
  • Add buzzer for alarms
  • Replace the 3D printed part with a wooden grid cut in laser
  • Completely closed enclosure, better presentation
  • Fix some issues with the original board (like the lack of a beefy capacitor across the LED matrix power lines).

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PCB etching at home using vinegar

PCB etching is another big topic in the electronics DIY world. It’s something every electronics tinkerer ends up trying sooner o later. Even thou it’s a fairly simple procedure it requires some self confidence (or bravery) since it involves strong, smelly and hazardous chemicals.

Any etching procedure you read about can be described in 5 different steps: designing, transferring, etching, assembly and reuse or disposal. For every one of these five steps there are different options and there are thousands of web pages with instructions, recommendations, how-to’s… well, this is yet another one of those pages 🙂

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