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SparkFun will be closed May 25, 2015 for Memorial Day. Orders placed after 2pm on Friday the 22nd will ship out on Tuesday. Thanks!

Member #202380

Member Since: February 10, 2011

Country: United States

  • The last 2 times I’ve ordered this, it has not been the 5x3.2mm footrint crytstal, but rather a 6x3.5mm crystal. They are not interchangeable, so watch out! Hopefully this will be corrected soon.

  • Hello! Could someone explain what the HV and LV pins are for? I can’t figure out any use other than for probing the input and output voltages for verification purposes. Shouldn’t they simply be pulled to TXI and TXO voltages?
    Also, I’m not sure how the mosfets do the voltage step-up. Can someone explain that as well? I would very much appreciate it - I’m fairly new to circuit design. Thanks!

  • The LED is connected to the 5V outputs, in series with a 1K resistor, according to the schematic.