While learning about charliplexing, I realized that we could easily add 2n Leds to standard n*(n-1) Leds for n I/O pins, making total LED = 2n + n*(n-1) = n(2+n-1) = n(n+1)
Here is how,
View attachment 65542
Let me know if it is already a well known method and if it has any name?
Here is how,
View attachment 65542
Let me know if it is already a well known method and if it has any name?