newbie2012:
- Is there a difference between the power from the "5V" output and the programmable ones?
The "5V" output is limited in power by the onboard voltage regulator and will be somewhere around 800 milliamps and that current is shared by everything on the board. The current from a single output pin (the "programmable ones") needs to be limited to 40ma max (20ma limit is recommended) -- going over this 40ma limit can burn out the pin.