Week 9 - Technical troubleshooting (LCD).

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         After the 12V AC to DC power supply arrived, I plugged it into the Arduino Uno to use it as the main power supply. Before plugging it in, I reupload the programme code once again using Arduino IDE into the Arduino Uno just to make sure it works fine. 

          Then, I disconnect the Arduino power cable and plugged in the 12V power supply. After plugging in the power supply, everything works fine until the LCD module starts to turn bright and then it has no display. Realizing that the LCD might be broken, I turned off the power supply and checked the LCD. I switched back to the Arduino 5V USB power supply and the LCD remained to show no display. 

              After doing some research, I found out that if the Arduino board is supplied using the power jack, the Vin voltage will be the same as the power jack voltage. So this means that the Vin is supplying 12V to the LCD module. This means that I accidentally supplied 12V to an LCD module which only needed 5V. Thus damaging the LCD module. Realizing the mistake that I have done, I purchased a new 5V AC to DC power supply from Shopee. 










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