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Type: Posts; User: areddon

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    [SOLVED]Closed: Re: Need very basic R-C "delay off" circuit

    Thanks ... close to solved. One last question about role of diode.

    You wrote:



    I want fast charging of cap for a fast turn on and slow discharge of cap to delay turn off by 5-10 seconds.
    ...
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    [SOLVED]Closed: Re: Need very basic R-C "delay off" circuit

    Thank you very much. Clear and simple, except where you say:



    I do not understand reference to Schottky. Are you suggesting to use a Schottky for the flywheel protection diode on the relay to...
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    [SOLVED]Closed: Need very basic R-C "delay off" circuit

    I just got some great help on this forum to resolve a logic gate issue, so I thought I would try my luck with what I hope is my last issue.

    Below may be too much context and you may ant to skip to...
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    [SOLVED]Closed: Re: Trouble with frying 74LS11N AND Gate

    FmV, KlausST, schnidtt trigger, and dick_freebird:

    All great and helpful responses. Added resistors, tied down the pins on unused gates, and good success on my third try.

    Thank you all.
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    [SOLVED]Closed: Re: Trouble with frying 74LS11N AND Gate

    There is nothing else attached to 1B or 1C except the transistor drain terminals.

    Would it be acceptable to post a PDF of a hand drawn schematic or is that a bit rude/disrespectful?
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    [SOLVED]Closed: Trouble with frying 74LS11N AND Gate

    In a prototype board for Lithium battery charge control, I have a three input AND gate (74LS11N).

    The inputs to the AND gate are:

    1A = 5/0 volts from a digital output pin on an Arduino nano ...
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