Find a schematic or pinout diagram of an arduino.
Pins A4 & A5 are SDA & SCL pins for I2C. If you do know what I2C is then you should know that these pins require 4.7k to 10k ohm Pullup resistors to +5V.
Find a schematic or pinout diagram of an arduino.
Pins A4 & A5 are SDA & SCL pins for I2C. If you do know what I2C is then you should know that these pins require 4.7k to 10k ohm Pullup resistors to +5V.