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Thread: Universal startup/shutdown controller

  1. #1
    Low Bitrate MibMib's Avatar
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    Universal startup/shutdown controller

    DIY project -it's not difficult
    Like I promised in neighbor thread, I drew on a paper simplest universal controller schematic, which could be used for inverters, or laptops or something. So I didn't use any chip-controller - because it needs in programming- it's not difficult to me, but for newbies i think will. So it's fully analog components based.
    Provides:
    1. "on delay"-time before inverter or something gets power-to provide cranking surviving.
    2."Power on delay" - time before it'll "push" power button
    3. "Push" power button when ign off and waits for some time before kill power fully
    4. Variable Remote output delay
    So - I'll try to draw the schematic in some program tomorrow and post it here.
    I didn't calculate values of parts yet.
    Also it consits tl431-3 pieces, 6 micro relays( am i crazy ? ) , 3 transistors , 10 diodes, some resistors and capasitors.
    but it's very simple&cheap

    what do you think about 6 microrelays ? I think it's a lot of
    Also you can use Principle of time delay, which described in tl431 datasheet, to provide more controlled remote outputs on any psu - about this i'll try to write tomorrow. Give me some time please
    400Watt CarPC power supply for powerfull systems- thaks for Beta testers- it was perfect.

    Remember - AMD Athlon XP (socket A) powers from 5v rail in most times !

  2. #2
    Low Bitrate MibMib's Avatar
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    Ok! here is a schemtic!!! Component's values not calculated yet
    Name:  controller.jpg
Views: 574
Size:  50.7 KB
    what do you think about it ?
    400Watt CarPC power supply for powerfull systems- thaks for Beta testers- it was perfect.

    Remember - AMD Athlon XP (socket A) powers from 5v rail in most times !

  3. #3
    FLAC
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    Wow looks great. Thank you for taking the time to design this and sharing. This would be useful to me because I am using an inverter and do not plan to get a DC-DC anytime soon. However, I was hoping for the schematic to be simpler =(

    I do not need some of the features such as on-delay or power-on delay, so does that mean I can just ignore those components and just assume its a wire (without the ground)?

    Looking forward to your calculated component values =)

  4. #4
    Low Bitrate MibMib's Avatar
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    nobb
    I can't say "yes", because I don't know what do you want to use, but you also right- if you understand how it works.
    as i understand you needs only "pushing power on button" when ign on and push it again when it's off ?- to realize it -you needs only voltage reg, some diodes and capacitors, power button delay and 1 additional relay does your system survives cranking ?
    2ALL
    Ok! When I'll have calculated values, i'll try to write an article - about timing circuits based on
    tl431 to give you a knowledge - that it works very simply, and you will calculate, design and use it as you want.
    About voltage reg - it provides 5 v dc to make constant capascitors time charging
    400Watt CarPC power supply for powerfull systems- thaks for Beta testers- it was perfect.

    Remember - AMD Athlon XP (socket A) powers from 5v rail in most times !

  5. #5
    FLAC
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    Yes, I only need the power button pushed with ignition is on, then push again when its off. My system already survives cranking. And no, sadly I do not understand how your circuit works =(

  6. #6
    Low Bitrate MibMib's Avatar
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    nobb Oh it's very simple thing
    use 2 12-volt microrelays and capacitor - decreasing or increasing value of it, you can change time of powerbutton's contacts shorting-best method is experience - for first step - use 2200uF/25v capacitor.
    Name:  powerbutton.jpg
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    400Watt CarPC power supply for powerfull systems- thaks for Beta testers- it was perfect.

    Remember - AMD Athlon XP (socket A) powers from 5v rail in most times !

  7. #7
    Low Bitrate MibMib's Avatar
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    Oh, I havn't enough time, but i wrote a little article about calculation timing RC networks- there is a formulas and example. If you have any questions - i'll try to answer enjoy
    400Watt CarPC power supply for powerfull systems- thaks for Beta testers- it was perfect.

    Remember - AMD Athlon XP (socket A) powers from 5v rail in most times !

  8. #8
    Constant Bitrate
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    Has anybody been able to implement this (the "simple" version)?

    I tried this circuit and it seems to short the pins too long. I'm using a 2200uf/35V cap. I'm going to switch to a 1000uf/35V cap.

    MibMib.... thanks for taking the time to post this.

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