PIC18F4550 belongs to ‘PIC18F’ family of microcontrollers. PIC18F4550 is one of popular Microcontrollers from the microchip technology, comes with a High-Performance, Enhanced flash, USB Microcontroller with nano-Watt-Technology.
RASPBERRY PI 3 is a development board in PI series. It can be considered as a single board computer that works on LINUX operating system. The board not only has tons of features it also has terrific processing speed making it suitable for advanced applications.
ATTINY45 is high performance, low power controller from ATMEL. It is an 8 bit controller based on Advanced RISC architecture. It is one of members of ATTINYXX series, popular because of its small size and features.
ATMEGA328P is high performance, low power controller from Microchip. ATMEGA328P is an 8-bit microcontroller based on AVR RISC architecture. It is the most popular of all AVR controllers as it is used in ARDUINO boards.