Enhancing Arduino ADC resolution with dithering & oversampling

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 […]

App note: Enhancing ADC resolution by oversampling

Better ADC resolution can be accomplished by oversampling two or more ADC readings and then averaging them. If you’re not satisfied with a microcontroller’s 10 bit ADC and need more resolution, check out this application note from Atmel. Increasing the ADC resolution by one bit requires 4 ADC measurements.  Four 10 bit readings are needed […]