- On the Arduino board, remove the red wire from the 5V pin
- Insert the red wire into pin 13 on the opposite side of the Arduino board.
STEM Connections
Before you move the red wire, the LED circuit that we built is not blinking because the circuit is still connected through the 5V pin on the Arduino board. The 5V pin is a power pin. Power pins provide power just like a battery. There are digital pins on the opposite side of the Arduino that can be controlled by computer programs that you upload to the Arduino board. The Blink program you just uploaded is controlling whether or not the voltage is HIGH or LOW on pin 13. So, when you move the red wire to pin 13 you should notice the LED begins blinking.
LED not blinking
1. Check that the Rred wire is not in pin 13, double check it is (could be one off).
2. Check for “done uploading” message, if not, try uploading again or return to the previous step for look at troubleshooting.g for upload
3. Double check that the LED circuit is correctly put together
- Red wire: Pin 13 – red row
- Black wire: GND – black row
- Resistor: red row – blue row
- LED: long led (+) in blue row, short leg (-) in black row
4. Replace the LED
- Pause here and make sure everyone has a blinking LED. The following steps will explain each section of the Arduino Blink code. We explain every section of the Arduino code in our 1 day experience before we have the students change their code.