Problems with Arduino DIY Doser

[Gastel]

Hi guys,
I am currently having a go at programming/building a dosing pump using arduino for my RSM 130D.
I had it all wired up and running fine then suddenly my I2C lcd display started showing only blank white squares along the top line.
I have since gone back to basics and tried just running the old "Hello World" scketch but for the life of me I can't get the LCD to display anything.
I have swapped arduino board, I have two uno's and a mega 256 and I have swapped LCD's from a 16x2 to a 20x4 but I cant get anything to display.
I am pulling my hair out and am so frustrated that I am ready to ditch the whole thing, especially seeing I had it working and ready to mount.
Can anyone out there help me PLEASE.

 

[BigAl07]

Sorry to hear about your equipment problems. Hopefully someone will come through and offer some help. Unfortunately there are only a small handful of Reef Sanctuary members dabbling in Arduino but maybe someone can offer some advice.

Here's a for you

 

[reefer gladness]

You might try the Reef Angel forum, it runs arduino. I dabble but not well enough to diagnose your problem.

 

[StirCrayzy]

PM willieMcdaries he's got lots of info and building his own.

 

[Gastel]

Thanks for the replies.

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