Check out the following basic circuits of interest when practicing or using Common or DIY electronic components in an autonomous circuits, with Arduino-like boards or else when hacking electronic devices.
We try here to build reusable links between basic knowledge and playful applications along with useful resources and tools that can be easily customised and re-used for any related project and survey a few related topics, among which:
Simple augmented Objects
Connected ojects and computer peripherals
Light Control and House-Automation Systems
... and here are a few Hacking examples that used these resources: