February 14, 2011
about 4 years ago
Hi, I got that board, tried to use it with Arduino Uno powered by the USB connection, it is working except LCD is dark,
there is no backlight working.
Also at least one of resistors R3, R4, R13 is getting pretty hot. I can’t distinguish which one exactly :(
I accidentally shunted R13 with my multimeter probe for parts of a second and backlight turned on immediately, and that one hot resistor cooled down quickly. When I turn board off and on again, it is the same story, backlight not powering…
Can somebody help me, please?
I don’t understand schematics of voltage boost circuit to explain myself what is the problem.
No public wish lists :(
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