Monday, July 6, 2015

Building Your Own AVR / Arduino Internet of Things (IoT) Development Board Part 3

This is part 3 in a 5 part series where we build our own AVR / Arduino Internet of Things (IoT) development board, yay! In this part we will finalize our design schematic and parts list so we are ready to do PCB layout in part 4.



Final Design Schematic:


Bill of Materials:
  • Atmega 328P MCU (Dip Package)
  • 16MHz resonator
  • BLE Micro from DFRobot or equivalent
  • LM317 Voltage Regulator
  • Resistors (Ohms): 10k, 2x 1k, 2x 300, 1k POTENTIOMETER or 500
  • Capacitors: 4x 100nF (Ceramic) and 1uF (electrolytic)
  • LED 5mm (any color you want)
  • 0.1” male pins
  • 2x 0.1” 2x4 female header (optional)
  • 4x 0.1” pin jumpers
  • DC Power Jack (+ pin is 2.1mm) 
  • 13uH Inductor (optional)
  • Female pin headers: 6 pin, 2x 8 pin, 10 pin
  • 28 pin DIP Socket (optional): part # 4828-3004-CP