![Understanding HIGH and LOW Arduino Pin States :: Open Source Hardware Group Arduino Tutorials - YouTube Understanding HIGH and LOW Arduino Pin States :: Open Source Hardware Group Arduino Tutorials - YouTube](https://i.ytimg.com/vi/UleNSti4TSw/hqdefault.jpg)
Understanding HIGH and LOW Arduino Pin States :: Open Source Hardware Group Arduino Tutorials - YouTube
![electronics - How to check if all pins are connected on my board to make sure Arduino sends the correct pattern number on my tool - Arduino Stack Exchange electronics - How to check if all pins are connected on my board to make sure Arduino sends the correct pattern number on my tool - Arduino Stack Exchange](https://i.stack.imgur.com/VoSVn.jpg)
electronics - How to check if all pins are connected on my board to make sure Arduino sends the correct pattern number on my tool - Arduino Stack Exchange
![Any idea why my relay (pin 2 is switching on when set to LOW and off when set to HIGH?) it is not the if statement as I have taken the HIGH Any idea why my relay (pin 2 is switching on when set to LOW and off when set to HIGH?) it is not the if statement as I have taken the HIGH](https://i.redd.it/xh2e5ak8ho271.jpg)
Any idea why my relay (pin 2 is switching on when set to LOW and off when set to HIGH?) it is not the if statement as I have taken the HIGH
![I don't get why the LED is still going when port 13 is set to high. If anyone could explain that would be great! :) : r/arduino I don't get why the LED is still going when port 13 is set to high. If anyone could explain that would be great! :) : r/arduino](https://preview.redd.it/i-dont-get-why-the-led-is-still-going-when-port-13-is-set-v0-vyn6gzypol7b1.png?width=474&format=png&auto=webp&s=1c3f42a3d5b0f7b5d4e5b8a826bba2987f5a7c46)