In this lecture I will show you how to put together your first circuit, write the sketch for it, and then upload the sketch to your Arduino to make it all come to life. This circuit will make an LED light to blink on and off.

In the process of getting this circuit to work, you will learn some basic Arduino programming commands and structures, what is a digital output, and, of course, what is an LED!

In this Part 1, I discuss diodes and LEDs, and construct the circuit.