AnalogRef Pin issues (or missunderstanding?)

[johnerrington]

@lost_memories

The way I tried to get a low ref voltage is via using the 5V pin and ground, setting up another voltage divider and feeding the signal in between those two resistors into the Aref pin.

How to make a schematic you can post.

When you submit a question on the forum you will usually need to add a schematic (circuit diagram). The tutorial that follows will explain some ways to create a useful image; however lets start by explaining how to add the image to your post. Its easy. Having created the image all you need to do is : Save the image somewhere convenient - maybe your desktop Start your post, and place the cursor (insertion point) where you want the image to be shown; [upload image to forum] 3: click th…

Playing with the Aref pin is a recipe for disaster. Also the ADC is unlikely to give better resolution with a lower Aref.

Its very easy to make an amplifier to give a better signal to your ADC.

Using Operational Amplifiers in your Arduino project

Introduction: Using Op Amps to measure signals with an Arduino Who is this tutorial for? Well, not "newbies" or anyone happy to just connect together modules. If you have a LITTLE knowledge of electronics, have perhaps used a transistor or a FET to extend the output capability of an arduino, and want to learn about ways to handle different Analog inputs, than read on! What will you need? All you will need to carry out a few simple experiments is a breadboard, a couple of (very inexpensive) …

Alternatively you can use an external adc such as the ADS1115 to read the voltage directly.