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Thread: DC-DC Converter for C134 EPIA M1000 Nehmiah

  1. #1
    Newbie entr0py's Avatar
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    DC-DC Converter for C134 EPIA M1000 Nehmiah

    Hi, I am new to the forum. I was wondering if I could get some input/advice.
    I have recently purchased a Casetronics C134 with the EPIA M1000 Nehemiah and I am looking for a easy way to plug it in to my cigarette adapter to power it and regulate the voltage. Has anyone used Switched Mode DC-DC Converter 65W SM4662 Laptop Power Adapter (12V input, 12V at 5.4A output.) with the C134? They are based in the UK and they are ~ $120.00 (shipping is ~$50.00). My questions are:
    Will this application work?
    Will it provide adequate voltage regulation?
    I will put a simple switch in front of the converter to turn it on and off.
    Your advice and comments would be greatly appreciated.

    http://www.switchedmode.com/4660LT.htm
    http://www.switchedmode.com/993pdfs/4660-993.pdf
    Thanks

  2. #2
    Low Bitrate shadowlessman's Avatar
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    Quote Originally Posted by entr0py
    My questions are:
    Will this application work?
    Will it provide adequate voltage regulation?
    I will put a simple switch in front of the converter to turn it on and off.
    Your advice and comments would be greatly appreciated.

    Thanks
    1) Yes and no... it will likely work for you fine when the car is on or off, but will likely drop out while cranking the engine. If this is a problem, do a search on "tank circuit" and read.

    2) Yes, the voltage regulation is within the limits of the 60W DC-DC board that comes with the C134. If it turns out to be too low/high, the page did say that it has an internal potentiometer for a bit of adjustment. It should also provide enough current.

    However, as much as this thing costs ($120 +$50) you might as well buy an Opus. The Opus will likely not fit in the C134, but it has a builtin shutdown controller and is quite proven by the users here. (I do not own one, so I cannot vouch for this myself, but having many satisfied users and no dissatisfied users cannot be too bad)
    "Buckethead's this guy that was raised in a chicken coop and without the bucket on his head, he's helpless"

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  3. #3
    Newbie entr0py's Avatar
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    Thanks for the reply shadowlessman. I talked to the guys at Opus a while back, there is no way to fit it in the C134. I do not think they could have gotten the C134 any smaller! I guess I need to think about this a little more.
    Thanks

  4. #4
    Low Bitrate shadowlessman's Avatar
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    Quote Originally Posted by entr0py
    Thanks for the reply shadowlessman. I talked to the guys at Opus a while back, there is no way to fit it in the C134. I do not think they could have gotten the C134 any smaller! I guess I need to think about this a little more.
    Thanks
    Yeah I know. I have a C134 also and will likely lose that for the C137. Similar case design, can fit 2 PCI cards, fit bigger PSU and shutdown controller all in one case... not bad if I say so myself. I happen to like the handle on the C134 though.
    "Buckethead's this guy that was raised in a chicken coop and without the bucket on his head, he's helpless"

    - "Really? Oh my god..."

  5. #5
    Newbie VinnyP's Avatar
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    Hi, just ordered one of these, would the Opus 90W fit if I didn't have an optical drive in the case, or could it be mounted just attached to the case?

    Thanks

    Vince

  6. #6
    Low Bitrate shadowlessman's Avatar
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    Quote Originally Posted by VinnyP
    Hi, just ordered one of these, would the Opus 90W fit if I didn't have an optical drive in the case, or could it be mounted just attached to the case?

    Thanks

    Vince
    I'm not sure, but I know that Casetronic releases mechanical drawings of all of their cases, so you could take the measurements from that and the measurements of the 90W Opus to find out.
    "Buckethead's this guy that was raised in a chicken coop and without the bucket on his head, he's helpless"

    - "Really? Oh my god..."

  7. #7
    Newbie entr0py's Avatar
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    I pretty sure it would not fit. I have taken mine apart and there is simply not much room at all. the cables have to be run in the voids just to close the case. I am thinking about mounting the opus on the outside but there may not be enough room to run the cables out the right side of the case

  8. #8
    Newbie VinnyP's Avatar
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    Thanks,
    Think I'll try the external mounting route too Hopefully as I won't have a CD drive I may have more room for the cabling.

    Would appreciate it if you post how you get on.

    Vince

  9. #9
    Variable Bitrate Cyberphox's Avatar
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    opus 90 watt is 2.5' high. Casetronic C134 is only 2" high so no go.
    But if anyone wants to sell me their C134 case let me know
    Technology, Gadgets and Making Money Online
    http://www.genemills.ca

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