Drawing big circuits like this can be very easy in this portal.
48+ Schematic Arduino Uno Block Diagram PNG. I redistributed the original arduino uno schematic to be more readable below. The official arduino uno r3 schematic.
GSM Based Home Automation project using Arduino from i0.wp.com
The official arduino uno r3 schematic. There are pins with secondary functions as listed below. Use this to create whatever arduino shield you want.
Drawing big circuits like this can be very easy in this portal.
Next is the complete schematic diagram of a little arduino board for your everyday projects. Here the arduino uno schematic diagram (click to enlarge): Here's how we need to connect the nrf24l01 modules to the arduino boards. It also explains the role of every part of the arduino.
