SOLVED: System RESET works, sort of


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  1. #1
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    Question SOLVED: System RESET works, sort of

    Solved: see post #5:

    https://www.picbasic.co.uk/forum/sho...426#post156426

    ==========================================

    This works fine if I press it for nearly 1 second.

    Name:  Circuit RESET.png
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    But the LCDs display garbage if I press it quickly.

    I was hoping to get away from using a 555 timer and an inverter to trigger the mosfet.

    (yes, I had both ICs wired, and then I took it apart thinking I had found a shortcut, which isn't working as well as expected)


    EDIT: This guy just gave me an idea to try:

    https://electronics.stackexchange.com/a/322184
    Last edited by Demon; - 10th October 2024 at 23:37.
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!

  2. #2
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    Default Re: System RESET works, sort of

    Maybe you just need a cap in parallel of the button and a diode in parallel with the resistor, cathode to +Vdd. 10uF would be a good start.

    Ioannis

  3. #3
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    Default Re: System RESET works, sort of

    Quote Originally Posted by Ioannis View Post
    Maybe you just need a cap in parallel of the button and a diode in parallel with the resistor, cathode to +Vdd. 10uF would be a good start.

    Ioannis

    Nope, no difference.
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!

  4. #4
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    Default Re: System RESET works, sort of

    I tried this guy's idea of a RC delay on the mosfet.

    https://electronics.stackexchange.co.../322184#322184


    I tried with 10uF and all the way up to 1M (both to VDD like that link), no difference. I didn't even get a delay.
    Last edited by Demon; - 10th October 2024 at 22:54.
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!

  5. #5
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    Default Re: System RESET works, sort of

    GOT IT! Reinstalled the 555 timer with 7404 inverter.

    I had to up the capacitor to 100uF. Works beautifully with 10K.

    Just over a second (by eye), so now I can blip the button and reset is complete.
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!

  6. #6
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    Default Re: System RESET works, sort of

    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!

  7. #7
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    Default Re: SOLVED: System RESET works, sort of

    Quote Originally Posted by Demon View Post
    Nope, no difference.
    Quote Originally Posted by Demon View Post
    I tried this guy's idea of a RC delay on the mosfet.

    https://electronics.stackexchange.co.../322184#322184


    I tried with 10uF and all the way up to 1M (both to VDD like that link), no difference. I didn't even get a delay.
    How can that be true? I really cannot understand... A simple cap with a resistor will give the required RC delay. And if you want to quickly reset again, the diode, reverse biased in parallel with the resistor will rapid discharge the cap, even if it is big enough.

    Don't get it why it failed...

    Ioannis

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