In this chapter, two BLE Controller prototypes were built:
A DC motor and a seven segment LED display.
The littleBits DC motor electronic control circuit was discussed by way of reviewing the circuit schematic diagram.
The heart of the DC motor electronic control circuit is a power MOSFET (part number TPS2812C).
The TPS2812C is a dual high-speed power MOSFET driver capable of providing peak currents of 2 A to an electrical load.
The smartphone screen setup and control to operate the littleBits DC motor with the mobile app was discussed and provided as well.
The second BLE Controller prototype to operate a seven segment LED display was discussed.
The internal construction of a seven segment LED display was presented in this section of the chapter.
Two types of the seven segment LED displays—common cathode and common anode—were explained.
The common cathode seven segment LED display has all cathodes tied to one electrical pin. The common anode component has all of the anodes tied to one electrical...