If you upload this sketch you’ll notice that the LED is blinking once every second. Now let’s analyze the code. In the setup function is only one instruction that sets the pin 13 as OUTPUT. This ...

What was your first Arduino program? Probably an LED blinker — that seems to be the “hello world” of microcontrolllers. You probably moved on to things a little more complicated p… ...

After soldering all the components to the neat breadboard-style PCB, [CulinarilySpeaking] fired up the Arduino IDE and put the Blink example on the 644.