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Originally Posted by dcb;39365 (from workspace thread)
Glad the Mrs. is doing ok. It soulds like your display issues are an order of operations thing and not a hardware glitch per-se. Like you might need to bounce the power to the whole unit after you program it. Shouldn't affect in-car operation as long as you adjust your setup so the LCD is powered and connected to the duino before or at the same time the duino is powered up.
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Not following you here. What I had been doing was powering the LCD from the 5V and GND pins on the 'duino (which is powered as soon as the power supply is plugged in). Not sure if its bouncy power on the LCD or if it is a timing thing, but a soft reset always temporarily resolves the issue.
I tried powering the LCD from pin 15, but it wouldn't power. My multimeter shows only ~2.5-3V on that pin (though I know it's being pulsed, I don't think its providing enough power). Haven't yet tried a separate 5V source, but I plan on trying to power both from a computer 4-pin molex - the 'duino from 12V and the LCD from 5V.