The MCP23017 is a widely used 16-bit I/O expander manufactured by Microchip Technology. It facilitates parallel input/output expansion for microcontrollers via the I2C serial interface.
As the name suggests the Gravity Gesture & Touch Sensor from DFRobots offers both gesture recognition and touch detecting functionalities in a single module. The module offers a configurable gesture detection range with in 0-30cm.
The Arduino Nano is another popular Arduino development board very much similar to the Arduino UNO. They use the same Processor (Atmega328p) and hence they both can share the same program.
Microcontrollers are everywhere these days, if you look around your home, your car or work environment you will find them working silently under the hood and serving their purpose also because of the rapid development
ARDUINO DUE board is one of the most powerful development boards in the ARDUINO series. DUE board not only has tons of features but also has terrific processing speed making it suitable for advanced applications.
ARDUINO PRO MINI board is one of the application boards. Since it is an application board, it does not have an in-built programmer. USB port and other connectors are also removed. Because once it is placed in an application, programmer and connectors are basically useless.