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Thread: Disable Inverter Low Voltage Alarm

  1. #1
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    Disable Inverter Low Voltage Alarm

    PLEASE HELP!!

    Does anyone know how to disable the low voltage alarm on an inverter? Mine is VERY annoying every time I start my car. Or does anyone know where to buy one without it? Thanks!

    Dave

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    Rob
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    Quick easy solution, would be to replace the speaker / peizo element in the inverter with a resistor.
    And you say people actually pay money for M$ Windows?
    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)

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    Great idea! That's what I'll do, however, what size/ohm resistor should I use? Thanks

    Dave

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    Rob
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    That'll depend if it's a speaker, or a peizo element, speaker around 10 ohms will do, for peizo try 10K ohms. Someone correct me if I'm wrong.

    Rob
    And you say people actually pay money for M$ Windows?
    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)

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    I think it's a piezo. Either way I'll try it. Also, do you have any ideas on delaying the audio signal at power up? My car mp3 makes a loud pop noise in the speakers when I power up. I've though about a circuit that maybe would delay the signal a few seconds in order to let the system ground itself or whatever it does so it won't pop. Any ideas? Thanks again

    Dave

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    Rob
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    Originally posted by dave123456
    I've though about a circuit that maybe would delay the signal a few seconds in order to let the system ground itself or whatever it does so it won't pop. Any ideas
    A simple 555 and a few support chips should do the job. Let me know if you need a hand, I've got a few hours to kill between 9 & 5.

    Rob
    And you say people actually pay money for M$ Windows?
    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)

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    Hey thanks for all of the help. That's kinda what I was thinking. I'm trying to learn about designing things like that, but I've just started. I can pretty much take a circuit drawing and make it, just still slow on the design part.

    Can you make a schematic that will give left and right RCA inputs then go through the timer then output L/R RCA? I need about a 6 to 8 second delay before it switches on -- my on board sound beeps through the speakers during the POST test! It's also annoying! Anyway, I thought a variable resistor would be neat so I can adjust the delay time, unless you know how to disable the POST beep. I can't find any setting in the BIOS.

    Thanks again for your help!

    Dave

  8. #8
    Rob
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    Found one already on the net, have a look at this site

    Rob
    And you say people actually pay money for M$ Windows?
    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)

  9. #9
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    Rob,

    Thanks for the info! I just finished building the circuit and it works great. Gives me about an 8 second delay.

    Another question. I've noticed a bit of a pop noise in the speakers on shutdown, do you think if I grounded the computer/sound card that it may help? And where would I connect the ground?

    I think a lot of my problems will be solved once I get/build a DC-DC power supply, but I'm having trouble finding parts for the sproggy design. So I'm stuck with this whole inverter thing until then.

    Again thanks for your time, I really appreciate it.

    Dave

  10. #10
    Rob
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    I'm not sure if grounding the sound card will make much difference, it might be worth experimenting with the power off circuit as well, to see if you can disconnect the RCA outputs a couple of seconds before you turn the PC off however this will depend on how you turn your PC on and off.

    Also you might want to have a look at this thread It's an idea I just had.

    Rob
    And you say people actually pay money for M$ Windows?
    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)

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