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AI-generatedBoost Arduino ADC Accuracy with the 1.1 V Internal Reference
Using the 1.1 V internal reference on an Arduino boosts ADC resolution from ~4.9 mV to ~1.1 mV per count. Pair it with a 5:1 voltage divider, add a 0.1 µF capacitor, and you can read a 0‑5 V sensor with roughly 4.5× more precision—perfect for temperature probes and precision analog work.