I am trying to make an temperature sensor, that displays the temperature on a LCD. To run the LCD I am using a PICAXE Serial LCD Firmware chip (FRM010) and a PICAXE 20M2 to run the serial outputs to the Firmware chip, then to the LCD. I tried to get it to work on a breadboard and it did, but when I try to put it on a PCB it shows me two lines of boxes, one is slightly fainter than the other. I have tried replacing the Contrast resistor, trying both a 10K and a 4K7 one. I am currently using the 10K one. I am using a MIKROE-55 Character LCD 2x16 LCD that I bought from RS online.
Does anyone know what the problem I am having is and/or how to to fix it.
Does anyone know what the problem I am having is and/or how to to fix it.