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Project Notes

#003 LED Chaser

Blinks a series of 12 LEDs in a continuous loop.

The Build


There seems to a general mis-conception that resistors should be connected to the anode of a LED: not true.

This circuit simplifies things with a single resistor (1k is about right for the LEDs I used) on the common cathode part of the circuit. That’s fine in this case because we’re only going to have one LED on at any time.




Credits and References

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This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is just my personal collection of projects. Two main themes have emerged in recent years, sometimes combined:

  • electronics - usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting
  • scale modelling - I caught the bug after deciding to build a Harrier during covid to demonstrate an electronic jet engine simulation. Let the fun begin..
To be honest, I haven't quite figured out if these two interests belong in the same GitHub repo or not. But for now - they are all here!

Projects are often inspired by things found wild on the net, or ideas from the many great electronics and scale modelling podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know (or send a PR!). See the individual projects for credits where due.