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farcaller

Member Since: March 29, 2013

Country: Ireland

  • Tutorial - PowerCell Quickstart Guide | about 5 months ago

    What is the best way to read the remaining battery level? I believe, soldering a wire to JST connector would be the simplest, right?

  • Tutorial - How to Solder - Through-hole Soldering | about 8 months ago

    What is the correct way to use the tip tinner?

  • Product DEV-10999 | last year

    I had a problem connecting this board via USB, so I wanted to verify that bootloader is ok and tried to reflash it (via arduino uno as ISP).

    I suppose that the board would be 5V tolerant, so I plugged it to uno’s 3.3V and connected everything else as per usual ISP programming. Now, burning bootloader fails:

    avrdude: verification error, first mismatch at byte 0x0000
         0xfe != 0xff
    avrdude: verification error; content mismatch
    

    Ok, I try powering it from 5V, failing again:

    avrdude: verification error, first mismatch at byte 0x0000
         0xfe != 0xce
    avrdude: verification error; content mismatch
    

    Last try, I flash the 5V pro micro bootloader… and everything goes ok!

    Now, I have a few questions.

    The board is clearly 3.3V with LG33 voltage regulator and J1 being disconnected. Why cannot I flash it with 3.3V bootloader? The board, running with 5V bootloader is still underclocked, i.e. delay(1000) is actually a 2-second delay.

    And a bigger issue – USB is still broken (is it burned? wrong programming?)

Name Pieces Total
Tools
10 96.5