failure after power surcharge

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This topic contains 5 replies, has 2 voices, and was last updated by  moshang 2 years, 8 months ago.

Viewing 6 posts - 1 through 6 (of 6 total)
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  • #2293

    raph36
    Participant

    hi there

    after a a stupid power overcharge my groovesizer multi board won’t boot
    does anyone know which part might have burned ?
    the 1n914 diode ? power regulator ?

    thanks a lot !

    #2294

    raph36
    Participant

    oh and it got 12v center positive instead of 9v for about a second

    #2295

    raph36
    Participant

    oh sorry and it’s the 1N4001 next to the circuit power input i was thinking about

    #2296

    moshang
    Keymaster

    Heya raph36,

    I’m puzzled – both the 1N4001 and LM7805 are rated to withstand a lot more than 12v. Hopefully someone with more experience can weigh in with an answer.

    Let me know if you need me to send you spares – I’m guessing you should be OK if you replace the 1N4001 and LM7805. That said, there’s a chance of damage to the other ICs including the ATMEGA if a short occurred.

    MS

    #2300

    raph36
    Participant

    mmhh might have been the power supply itself that died, i don’t have another one to test it. so i’ll tell you later.
    i did not think about it at first, this is quite rare…well the groovesizer is more than probably ok.

    it should run on 12v, right ? this is just less efficient ? tell me if i understood well the voltage regulator specs ?

    #2309

    moshang
    Keymaster

    Heya Raph,

    Sorry, missed the question there – 12V will work, but the 7805 will get a lot hotter than on 9V. Also, there’s less room for error should your power supply actually deliver more than 12V (quite often the case). Best to stick with a 9V supply.

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