my local electronics shop insisted that the only way of doing this was by changing the Arduino for a 5v one
passing the output from the sensor through a voltage divider
Actually if you look at the data sheet it shows a peak Vo of just over 3v at 3cm. And the other graph shows a Vo of between 2v7 and just under 3v depending on the reflectance.So what you are seeing is about right, and it looks like you don't need the divider._____Rob
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