I'm working on a set of examples of the use of Finite State Machines in more complex projects. I have experience with doing this, and one difficulty in developing the code is tracing the sequence of states and state changes.
When printing stuff to the serial monitor is difficult or affects timing, I have used LED indicators to help understand the current state and see state changes.
A few years ago I found these nifty little plug-in LED strips that are perfect for this. See the example here (The LED strip at the top):
But I can't FIND the doggone things anywhere right now. And I would like to use them in online examples I want to publish, and help people doing this kind of work. Right now I'm deep in a Remote Generator Control project, helping an Engineer friend in Nigeria. I'm using 4 leds showing up to 16 states, and the two more for the critical START and STOP relays.
Anyone seen these? Know of a source?? 2 hours on Amazon / Ebay / Banggood didn't make it...
Any suggestions / pointers appreciated!!