February 12, 2010
about 4 years ago
I just fried my LCD by applying too many volts to VBATT.
I looked up the data sheet for the MC34063 - the 7V regulator. The data sheet says it’s a step-up/step-down regulator, and max input is 40v, so I think, hmmm… 15V should be no prob. But I didn’t read the whole data sheet (who does?) The MC34063 uses a different layout depending on which function it’s being used for. On this board, it’s wired as boost (step-up), not step down. Duh!
The LCD backlight came on for a while, then everything went dark…
No public wish lists :(
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