Troubleshooting
The projects in this chapter require some physical assembly of parts. The electronic aspect is similar to the projects in earlier chapters of this book.
Common precautions to take and the pitfalls to watch out for while implementing these projects include the following:
Make sure the VoodooSpark firmware is installed on your Photon and that it is functioning by building the example given in the Setting up a P2P network for Particle devices section in Chapter 3, P2P and Local Server.
While connecting the L293D motor driver, watch out for correct pin numbering of this IC, where, unlike the Particle devices, pin numbers are not labelled. They need to be discerned from a reference dot or notch on the IC itself. If you are new to handling ICs, see https://learn.sparkfun.com/tutorials/integrated-circuits#ic-packages for information on how to find IC pin numbers.
The Photon/Electron, L293D motor driver IC, and motors may be powered using different power sources. We normally connect...