Arduino Uno Hardware Manual Errata
Report errata for the Arduino Uno Hardware Manual, First Edition in the comments section of this page.
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Errata submitted to the comments section are included below.
Page 79 – Incorrect Calculation
2.7.5.3 Calculating Analog In Voltage
The second sentence in the first paragraph of section 2.7.5.3, at the top of page 79, reads as follows:
On the Arduino Uno we know that the default reference voltage is 5V, so the calculation becomes 1024 ÷ 5 × <analog value read on pin> = voltage.
The part shown in bold above is incorrect, it should be 5 ÷ 1024 which is how it is shown in the sketch that follows – the sketch that follows is correct. The sentence should therefore read as follows:
On the Arduino Uno we know that the default reference voltage is 5V, so the calculation becomes 5 ÷ 1024 × <analog value read on pin> = voltage.
