The AS7262 is a  6 Channel Spectral Sensor by Pimoroni that can be programmed in Python.  This guide shows you how to setup the sensor on a Raspberry Pi and then how to use python to get the results.

Does the Raspberry Pi3 need cooling and are the CPU heatsinks effective? After getting temperature warnings on my RPi3 I decided to see if heatsinks help.

A guide to setting up a simple web and FTP server in Arch Linux Arm on the Raspberry Pi.

This educational manual by CAS is a great resource for any Raspberry Pi user interested in learning to program. It covers the basics of using the Scratch programming environment, Python, hardware projects and using Linux.