You need to prepare a little. To do that, we're fans of Circuits.io, a design tool that let's you plan out your projects. Now you can do that even better with a new tool called 123D Circuits.

In a clever use of the Instructables Step 1, Step 2, et al. format, Plasmana lays out on each page a list of electronics vendors and makers that offer free, limited quantity samples to customers ...