All Arduino Tester
Have you ever worked on a project with an Arduino Uno or Nano and you are so sure that your code is working fine but there must be a problem with the Arduino? This little Arduino Uno tester is very simple to use and it is a quick way for you to make sure that all the I/O pins and the analog pins are working correctly. If one of the LEDs on the tester does not turn on when all the lights should be turned on, or one of the analog pins give a strange reading on the OLED when the potentiometer is turned, that means that there is something wrong with your Arduino Uno or Nano, but if all these pins test right, chances are that there is probably some mistake in the code.
Note: Arduino Uno an Nano not included, only shown in pictures for explanation purposes.
How to use it:
Step one: Download the code for the Arduino Uno tester
Step two: Upload the code to the Arduino Uno
Step three: Unplug the Arduino Uno and push the headers of the tester into the female headers of the Arduino Uno
Step four: Power the Arduino Uno and follow the steps on the OLED screen
How to find a problem using the tester:
If one of the LEDs are not switching on, the I/O driving for that LED is not working. You can quickly see what I/O pin/pins is damaged.
If one of the values on the LED is very different from the other values, the analog pin corresponding to the odd value is not working properly
If the Screen does not display the data, one of the I2C communication pins are not working
If the screen does not turn on at all, The 3V pin is not working
If none of the LEDs turn on and the values on the OLED screen does not change when you turn the potentiometer, the 5V pin is not working
If nothing on the board turns on, it means that there is a problem with powering the Arduino.