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Recent content by areddon

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    [SOLVED] 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. For fast "on" and slow "off", does the Shottky across the 220 have its cathode at the base of the...
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    [SOLVED] 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 speed up turn off, compared to a regular diode? If so, why do I want that when I am seeking delay...
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    [SOLVED] 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 my "question" at the end. For background, the context is a battery management system for a 200...
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    [SOLVED] 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] 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] 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 1B = drain of an N-channel MOSFET (HUF76423P3) acting as low side switch on a 5 volt supply 1C =...
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