Nixies won't light up and Q1 overheating

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This topic contains 1 reply, has 2 voices, and was last updated by  Gra Afch 5 years, 2 months ago.

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  • 02.03.2019 at 20:19 #12915

    goldengaming12
    Participant

    Hi,
    I have the NCT414 V1.1 with NCM109 v1.1 which I soldered. At first, all the TP1-3 measure the correct voltage, the RGB leds light up and so is the buzzer but the nixies turn on really faintly and then shut down completely. Q1 was hot.
    After some time and tinkering I noticed that TP1-3 are not correct anymore and the MOSFET transistor Q1 (FDM6N25) heats up and gets really really hot.
    I dont know how to proceed.
    Thank you in advance,
    Sean

    06.03.2019 at 19:06 #12929

    Gra Afch
    Keymaster

    If at TP3 is not at least 11.2 volts, then the problem is most likely in the power supply.

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