Hi y'all, electronics noob here looking to get a bit of support on a small project, using a 3.2 I'm looking to read button presses and use those to light individual LEDs. I had this working initially, however I was using USB power to power the LEDs (13 in total) and I think the current load toasted the board. I've rewired this using a fresh board, cut the line to VUSB and have wired in external 5v to the board. The program logic works as expected however testing against a single LED is very dim, voltmeter only shows 1.2v, the tech spec shows Digital output at 3.3v, am I missing something for the voltage to be so low in my application?