The weird thing, it that the voltage can go above 5V and below 0V when I turn the encoder real fast.
I'm using USB voltage from the PC, so no idea how that happens. Maybe the scope loses it's place and drifts beyond the actual limits; I'm not knowledgeable enough to determine, and reviews are few.
EDIT: Argh, I'm probing an RC circuit. Voltage rises as capacitor charges, lowers as it discharges...
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