A little bit of help with the lighthouse circuit.

I had an email from a friend who has built my lighthouse circuit but whose LEDs were lighting up in the wrong order.  This is exactly what happened to me when I built it the first time too.  But no worries!

The great thing about charlieplexing and this circuit is that it doesn’t matter which order you place the leds on your board as you can change the code to match the correct sequence for your final layout.  This means that you can layout your circuit for ease of wiring rather than having to keep the LEDs in any particular order.  As long as the circuit is correct and that you have an LED everywhere you should have one the ordering can be sorted out later.

Continue reading