In this chapter we will deal with attaching some simple external electronics to the Photon or Core, including LEDs and switches. To connect electronic components like LEDs to the Photon/Core you will use something called solderless breadboard.
Solderless breadboard (or just breadboard) was invented as a tool for electronics engineers to prototype their designs before committing the projects to a more permanent soldered form. They do, however, make an excellent tool for you to experiment with electronics and make your own projects without the need for any soldering.
Figure 4-1 shows a breadboard with a Spark device, an LED and a resistor attached to it.
When you buy a Photon or Core, one ...