I was testing the output voltages with my multimeter and found that when the jumpers were on the 3.3v it indeed measured about 3.3v (was actually 3.1v), which was good.
When I put the jumpers on the 5v, it measured as about 12.9v!
The board has two voltage regulators. A 3.3volt and a 5volt one.
Did you try the 5volt rail with some load, e.g. a 1k resistor.
An "unloaded" regulator could oscillate, and throw your readings off.
Lineair regulators like this one can never produce a higher output voltage than what you put in.
Note that the 5volt regulator can only deliver ~200mA with 12volt on the DC jack.
And ~350mA with a 9volt supply.
The 700mA stated can only be reached with 6-7volt input.
Same or even less for the 3.3volt output.
Leo..
Indeed, though I tried all four pin pairs when on the 5v jumper and it very much came out every time the same.
This is why I am puzzled.. I can take a photograph to prove my innocence!
My thoughts were that perhaps the power supply isn't regulated so until I add some load (e.g. the resistor suggested above), then this might explain the odd behaviour?
flipcode:
The input was 9v 500ma, which seems within spec.
Did you measure the input voltage?
I blew up a couple of these with a "12 V" wall-wart that was running somewhat higher than 12 V (around 18 V in reality). In my case the 1117-5 5 volt regulator blew but the 1117-3.3 3.3 volt regulator continued operating and replacing the 5 volt regulator brought the whole thing back in spec.