How to Choose Electronics Parts to Buy.
Once you start imaging your own electronics projects, it can be confusing to figure out exactly what to buy. Both Sparkfun and Adafruit offer a huge selection of components and boards, but how can you know they'll work with your project?
Here's what I do - check the Johnny-Five examples. I browse through all of the parts and pick from there. That way, I know that J5 has support for that component. As a bonus, all the examples come with wiring diagrams, so you know how to hook up the new part. This will work for simplish builds, and it's worked for me so far.