×

It is that time again! SparkFun Electronics will be closed Friday, January 13th for our annual inventory day. Please keep in mind that any orders placed after 2PM (Mountain Time) on Thursday, January 12th will not ship or be prepared for local pickup until we open for normal operations on Monday, January 16th. In addition, tours will resume on Friday, January 20th. Thank you for your patience!

rldkfl

Member Since: February 14, 2011

Country: United States

  • 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 :(