How to connect electronics to the Raspberry PI and make a program to create actions to the electronics.
First-time Installation and Setup
References
Learn simple Arduino circuits and basic coding.
Tutorial Series
Learn simple webdesign.
Client-sided Tutorials (Requires a text-editor)
Server-sided Tutorials (Requires an web-server)
Minecraft Tutorials on how to create a server, a plugin for it and even how to make a Minecraft Mod.