Enhancing Arduino ADC resolution with dithering & oversampling

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From the comments on our previous post Improving ADC resolution by oversampling and averaging application note, Edward Mallon writes:

I managed to get oversampling working well on cheap Arduino promini clones. Turns out all you have to do is toggle a digital pin connected to ground with the right size resistor to generate enough noise for the technique to work.

More details at Arduino based underwater sensors homepage.

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