![1pcs High Quality One Set Uno R3 (ch340g) Mega328p For Arduino Uno R3 + Usb Cable Atmega328p-au Development Board - Integrated Circuits - AliExpress 1pcs High Quality One Set Uno R3 (ch340g) Mega328p For Arduino Uno R3 + Usb Cable Atmega328p-au Development Board - Integrated Circuits - AliExpress](https://ae01.alicdn.com/kf/H7e3522e2bdda48959750a459a92e2e20W/1PCS-high-quality-One-set-UNO-R3-CH340G-MEGA328P-for-Arduino-UNO-R3-USB-CABLE-ATMEGA328P.jpg_Q90.jpg_.webp)
1pcs High Quality One Set Uno R3 (ch340g) Mega328p For Arduino Uno R3 + Usb Cable Atmega328p-au Development Board - Integrated Circuits - AliExpress
![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/maxresdefault.jpg)
Understanding HIGH and LOW Arduino Pin States :: Open Source Hardware Group Arduino Tutorials - YouTube
![Increase Digital Pins of Your Arduino Using the 74HC595 (IOExtension Module With Arduino Library) : 5 Steps - Instructables Increase Digital Pins of Your Arduino Using the 74HC595 (IOExtension Module With Arduino Library) : 5 Steps - Instructables](https://content.instructables.com/ORIG/FCO/3GU6/IWWFT36H/FCO3GU6IWWFT36H.png?auto=webp&fit=bounds&frame=1&width=1024)
Increase Digital Pins of Your Arduino Using the 74HC595 (IOExtension Module With Arduino Library) : 5 Steps - Instructables
![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://preview.redd.it/xh2e5ak8ho271.jpg?auto=webp&s=acd9adedec6f11d348c07c17620beeef19503cc4)