When the pin is high it should be at the same potential as VCC so no...it's not a short it just turns the diode off (no potential difference so no current can flow).
Well worked out BTW 
You might be interested in looking up charlieplexing 8)
When the pin is high it should be at the same potential as VCC so no...it's not a short it just turns the diode off (no potential difference so no current can flow).
Well worked out BTW
You might be interested in looking up charlieplexing 8)