Applied 24V to limit switches input by mistake

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  • January 14, 2022 at 12:48 pm #12120
    pedro_nf
    Participant

    Hi all,
    by mistake I connected the limit switches positive common wire to 24V so when I powered up the TinyG I saw a small flame over the CPU and then lots of smoke 😐
    Can I get away from this error by just replacing the CPU chip or are there other components that might also be dead?

    January 18, 2022 at 9:27 pm #12122
    cmcgrath5035
    Moderator

    Based on you description of what happened, I would not recommend spend a lot of time and money on this tinyG. 24 V and 3V logic don’t mix well, and there is no way to quantify which interfaces(chips) may have been affected.
    BTW, because tinyG has a lerge ground area that also act as a heat spreader,
    Soldering even a few pins is a difficult task.
    Sorry, RIP tinyG

    January 19, 2022 at 9:11 am #12123
    pedro_nf
    Participant

    Thanks for your reply, yeah I already ordered a new one.
    If I have the time I’ll try to repair it, if I manage to do it I’ll post here the result 🙂

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