Congrats on building your first circuit with the Adafruit Metro!
Let's play around to make your circuit better and learn some more tricks/tips that will be useful later on.
The LED is connected to pin 13 but we can use any of the METRO’s pins. To change it take the wire plugged into pin 13 and move it to a pin of your choice (from 0- 13)
You can also use analog 0-5, Analog #0 is 14, Analog #1 is 15, etc.
Then in the code change all occurrences of LED_BUILTIN -> newpin. That is, change every LED_BUILTIN to 8
Then Upload the sketch: by pressing ctrl+u
Change the Blink time
Unhappy with one second on one second off? In the code change the lines:
digitalWrite(LED_BUILTIN, HIGH); delay(time on); //(seconds * 1000) digitalWrite(LED_BUILTIN, LOW); delay(time off); //(seconds * 1000)
Control the brightness
Along with digital (on/off) control the METRO can control some pins in an analog (brightness) fashion. (more details on this in later circuits). To play around with it. Change the LED to pin 9: (also change the wire) by replacing all LED_BUILTIN with 9
Replace the code inside the { }'s of loop() with the following line:
analogWrite(9, new number);
Note that in the line above,
new number is any number between 0 and 255. 0 turns the LED completely off. 255 is the maximum brightness of the LED. Anything between 0 and 255 is a varying brightness. Play around and find one that you like.
