Every Pin on Circuit Reading High

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Electric Potato

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Hey all,

I am having an issue with every analog and digital pin being buried at 1023 (T3.1); the inputs are a variety of knobs, piezos, and buttons. This is on a protoboarded circuit that worked just fine previously but I made some minor changes to it (swapping out some weak wires). If I jiggle the thing around slowly this behavior stops; it only happens at a certain angle so it seems to be a weird joint or wire cross, but I've never had such a thing that effected every input like this. (this happens on both USB and 4.5V battery power)
It makes me wonder if it's somehow receiving more than 5V via a short? So I figured I'd ask before leaving it plugged and trying to really troubleshoot it.

Thanks!
 
I'm not aware of any software-only way for such a thing to happen... so especially if the same software worked properly on your prototype, it's definitely time to start troubleshooting the hardware.

A first easy step involves simply using a multimeter, directly on Teensy's analog pin and GND, so you're measuring the same voltage Teensy sees (rather than connecting the leads at distant, perhaps more convenient locations).
 
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