SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.


Member Since: July 29, 2010

Country: United States

  • hello!
    I am using Ardupilot mega which uses ATmega 1280 processor.
    on the webpage for ardupilot mega, it recommends a 3v3 FTDI basic or a 5v power, 3v3 for communication FTDI USB cable.
    My questionis, does ATmega use 3v3 logic or 5V logic?

  • Thanks Tim.
    It seems that if I use this 3v3 product, it would only supply 3v3 power to my ardupilot board.
    It works fine with my board right now.
    I guess my question is,will other digital peripheral devices works fine with a 3.3v logic? if my ardupilot board output a logic HIGH, will it be recognized as a logic HIGH by other 5V logic devices?
    Could you explain to me why its using 3.3v for RX and TX instead of 5V?
    Thank you very much!

  • Why we need a 3.3 FTDI anyway?
    isn’t this board run on 5 volts?
    I bought the 3.3v FDTI basic, if I modify the voltage output and TX and RX to 5V, will it still work with this board?
    Thank you!

No public wish lists :(