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Thread: Opus vs. ITPS + pw70

  1. #1
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    Opus vs. ITPS + pw70

    i've been doing my research, and i've got one question. what are the advantages of the opus over the ITPS + pw70 setup? i don't need the power of the opus, i'll only be powering an EPIA board with 7200 rpm hd and a 4 line text lcd display. or do i? all i've been able to come up with is that the opus is more power efficent, and that it will survive the crank. is that it? any input is helpful. thanks a lot.


    ray

  2. #2
    Maximum Bitrate jusatry's Avatar
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    Quote Originally Posted by raypsaliga
    i've been doing my research, and i've got one question. what are the advantages of the opus over the ITPS + pw70 setup? i don't need the power of the opus, i'll only be powering an EPIA board with 7200 rpm hd and a 4 line text lcd display. or do i? all i've been able to come up with is that the opus is more power efficent, and that it will survive the crank. is that it? any input is helpful. thanks a lot.


    ray
    PW70 is not regulated, and the ITPS provides linear regulation with a 1.3V dropout. That is, you need 13.3V to get 12V to the computer. So anytime your battery is lower than that (read: when the car is off), your ITPS will not work. also, when the batt voltage falls (during normal use) below 13.3 v, your carputer will shutdown.

    most people i know just use the ITPS as a startup/shutdown controller....

    just a thought

  3. #3
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    alright, thanks a lot. it was helpful.

  4. #4
    Maximum Bitrate Marsupial's Avatar
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    does the OPUS control startup/shutdown?
    -Mars

  5. #5
    Raw Wave Confused's Avatar
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    Quote Originally Posted by Marsupial
    does the OPUS control startup/shutdown?
    Yes it does. It detects when the ignition is on, and about 5 seconds later it turns the PC on. It will then turn the PC off after 10 secs/20/40/60 mins (adjustable)


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  6. #6
    Maximum Bitrate Marsupial's Avatar
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    can that off delay be changed on the fly? like when required...

    or having the car on accessories would let the PC on? that would be perfect.
    -Mars

  7. #7
    Maximum Bitrate Marsupial's Avatar
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    Sorry for double posting.
    I just saw a detail that got me into selecting the OPUS solution instead of the other one.

    The OPUS PSU is rated with an operating temperature range of -25 to 70 degrees celsius. This is more then I expected for a PSU, and will suit the canadian climate needs for a carputer.

    Tough I would state it for the others to know.
    -Mars

  8. #8
    Variable Bitrate Cyberphox's Avatar
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    Now we need a Canadian group buy on the Opus right??



    Quote Originally Posted by Marsupial
    Sorry for double posting.
    I just saw a detail that got me into selecting the OPUS solution instead of the other one.

    The OPUS PSU is rated with an operating temperature range of -25 to 70 degrees celsius. This is more then I expected for a PSU, and will suit the canadian climate needs for a carputer.

    Tough I would state it for the others to know.
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  9. #9
    Variable Bitrate Cherub211's Avatar
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    I've built an ITPS according to the specs on mini-box's website. The LDO I worked with (was the same part as the comercial ITPS) does not drop out untill the supply voltage is below 12v.

  10. #10
    Maximum Bitrate Marsupial's Avatar
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    I'll definately get one, not sure when. If we manage to get a canadian group buy and have a substencialy low shipping cost, count me in.
    -Mars

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