ProfBob

Member Since: November 16, 2009

Country: United States

  • Product LCD-09363 | about 3 years ago

    Hello Ken, Just looked up the data sheet and did the calculations for the volatge boost citcuit. Reisitor R2 should be a 15K. Check your board the resistors are to the right of the large capacitor and left of the word “color” the center 2 gray components. If they both say 3301 then SparkFun got a bad run of boards.

  • Product LCD-09363 | about 3 years ago

    No Backlite boost voltage. Just received the board today and have the same problem as Ken-Hack. You can barely see the Sparkfun Logo. I checked the the voltage boost out at C3 on the schematic and it is 5V and not 7V as stated. The resistors next to C3 should be R1 = 3.3K and R2 = 15K, both on my board are 3.3K
    Can anyone verify the resistor values on a “working” board. Thanks

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