Hi, I used the following blinking LED outputs on my Arduino by using different variables in the original Littlebits Blink sketch (instead of only using number 5 for the output definition):
Battery power connected to A0:
using 1 blinks LED on D1
using 5 blinks LED on D5
using 9 blinks LED on D9
using 0 blinks LED on D0 (on input side of Arduino...)
using A1 blinks LED on A1 (on input side of Arduino...)
Battery power connected to D0:
using A0 blinks LED on A0 (on input side of Arduino...)
So far my successful attempts.
I am not sure what happens if I connect the power to A0 and at the same time reprogram A0 to blink. i suppose the LED will not blink because it is connected to the power source. Could I damage the Arduino this way ? I did not test this......
I have not tested the extra pinholes yet, I am not familiar with the ICSP protocol.
Nice to know that VCC and GND are there also, so with a few small wires and components and HDK bits you could extend the arduino with six additional bit connections for A2 A3 A4 D10 D11 and D13, which might be a future wish...