How can I use the raspberry pi to read analog voltages

Question

I have a device that puts out 0-5v based on what it's doing. How can I use the raspberry pi to read those voltages? I would then have scripts do whatever is needed or maybe display via a webpage. I would like the pi to log the readings every second or every few seconds, just not sure how to start.

score 2 · Accepted Answer · answered Nov 02 '17 at 19:03

2

You need an ADC (Analogue to Digital Converter).

Google MCP3008 (a popular 10-bit 8 channel ADC) as an example.

answered Nov 02 '17 at 19:03

joan

71,014
5
73
106

score 1 · Answer 2 · answered Nov 02 '17 at 21:26

1

You could use the ADC built into most* Arduino and connect to it using you RPi via a python script as depicted in this tutorial

answered Nov 02 '17 at 21:26

Dr.Rabbit

1,018
6
10

This was a great answer too. The other one was just more direct. I think I will end up doing this, cause I have to build a few systems once I get them up and going quickly. – ahackney Nov 03 '17 at 16:33

How can I use the raspberry pi to read analog voltages

2 Answers2