Al99 Posted February 1, 2019 Report Share Posted February 1, 2019 Hi I flashed the PIC18F452 with the firmware and built the core. I'm testing it with 9v dc and a 5 volt lcd display but the lcd display is not lighting up but the voltage regulator is getting very hot, what procedure do I follow to debug? where do I look for faults first? Quote Link to comment Share on other sites More sharing options...
Noise-Generator Posted February 2, 2019 Report Share Posted February 2, 2019 First I would check the core without the lcd and measure the outputs. Second, check if the pins to the lcd are connected correctly. Its not easy to give you a concrete answer because you don't explain what you did before, these are just standard advices. Quote Link to comment Share on other sites More sharing options...
jaytee Posted February 3, 2019 Report Share Posted February 3, 2019 Are you building a MIDIbox SID? You should be using an PIC18F4685. Beyond that, tough to say how to proceed, as you haven’t given us much information. If your regulator is getting very hot, that perhaps points to an error in your power circuit. Quote Link to comment Share on other sites More sharing options...
Noise-Generator Posted February 28, 2019 Report Share Posted February 28, 2019 As I'm working now at my Core and LCD again and having trouble I may can give you some advices. So you have the core schematic and lcd wiring for 4bit? First Backlight, mostly pin 15, K=Katode connect to B- and pin 16, A=Anode, connect to B+ Backlight should light up if these two pins are connected and the luminace poti, should work. Second, Vs, Vd, V0 connect to lcd pin 1,2,3 contrast poti should work. If this is working correctly, you can connect the data stuff. Quote Link to comment Share on other sites More sharing options...
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