fernandossala:
Hi there, I am trying to troubleshoot a board design for a touch sensitive toy I am developing based on Atmega8 with the internal osc configuration. It uses 10 super bright white LEDs which sink 20ma each, all of them connected with a respective 68r resistor and in series on pin 8.
You diagram shows the LEDs in parallel, not series. The LEDs are not sinking current, they are the load.
An output pin sinks current if the current flows into it, and sources current if the current flows out of it.
68 ohms is rather a low value to drop 1.8V at 20mA (most blue/green/white LEDs are about 3.0 to 3.4V)