~~tag>Edge-2L ADC~~

====== Edge-2L ADC ======

===== Introduction =====

This document explains how to use the Analog-to-Digital Converter (ADC) on the Edge-2L IO board.

<WRAP important >
To use the ADC functionality on the Edge-2L, you must attach the Edge-2L IO board.
</WRAP>

===== Hardware information =====

The Edge-2L IO board includes a 12-bit Successive Approximation Register (SAR) ADC.

^  Pin  ^  Voltage  ^  Device Node                                       ^
|  9    |  0~1.8V   |  /sys/bus/iio/devices/iio:device0/in_voltage4_raw  |



===== Reading the raw ADC value =====

Read the raw digital value from the ADC:

```shell
$ cat /sys/bus/iio/devices/iio:device0/in_voltage4_raw 
```
Example output:
```                                            
4082                                                 
```
Convert the raw 12-bit ADC reading to a voltage using the formula:
''Voltage = (value / 4096) * 1.8V''