SparkFun will be closing early at 3:30 Friday 5/27 and remain closed Monday for Memorial Day (5/30). Orders placed after 2pm MT on Friday (5/27) will process and ship out on Tuesday (5/31).


Member Since: November 16, 2009

Country: United States

  • HELP!

    I was writing a sketch to try interrupts (first time using interrupts) and uploaded the following code to my Pro Micro:

    int SwitchPin = 3;
    // the setup routine runs once when you press reset:
    void setup()
      bitSet(SREG,7);       // enable Global Interrupts
    // the loop routine runs over and over again forever:
    void loop()

    Now when a USB cable is plugged into the Pro Micro Windows reports “USB Device Not Recognized”.

    I have tried using an UNO as an ISP but avrdude reports “Yikes! Invalid device signature” (not sure if this is a result of the sketch or something else I am doing wrong)

    Any suggestions on how to restore it? Or is my poor little Pro Micro dead?

No public wish lists :(