DeepBlueSky 8 Posted March 11, 2015 Share Posted March 11, 2015 Hello, I bought a Sparkfun ML8511 UV sensor breakout and set it up according to this. It kind of works / I have a weird problem: No matter the voltage (3V or 3.3V), the sensor output values change periodically very strongly: Closer to UV-AB source: ~1.5 to ~10.5 to ~1.5 and so on (with more steps in between) (distance of course doesn't change). More away from the UV source: ~0.2 to ~1.5 to ~0.2 and so on. When I attach a 1.5V battery constant voltage source as a test, the displayed value is indeed rather constant ranging from 4.39 to 4.59, so it must be the sensor's problem? Google-ing this problem didn't reveal any results. I tried using A0 and (A1-A5) because of possible noise? but this unfortunately didn't help. I'm using a MSP430G2553 and its ADC10, on a breadboard. Is this a known problem of such a setup? Quote Link to post Share on other sites
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