Electronics Fan-bus using momentary switches.. please read for explination

Discussion in 'Modding' started by MarkDixon, 5 Jan 2003.

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  1. MarkDixon

    MarkDixon What's a Dremel?

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    I got it now. I almost fully understand the curcuit, now I just need to build it.
    I dont suppose anyone out there in the UK could supply me with the curcuit boards to maount it on, if you have the right equipment. I will pay for all materials, postage and of course your time.. :)

    Thanks, Mark
     
    MarkDixon, 8 Jan 2003
    #41
  2. acrimonious

    acrimonious Custom User Title:

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    i can provide you with the PCB artwork if you like.

    I'll auto route it for you tommorow.
     
    acrimonious, 8 Jan 2003
    #42
  3. guzzler

    guzzler What's a Dremel?

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    we should get a number of PCBs printed for this, and sell properly, seriously... this is SOOO much better than most baybus efforts! I'll put a PCB together and post it here!!

    btw, why use the relays at all?? There just expensive and take up a lot of space!

    g
     
    guzzler, 8 Jan 2003
    #43
  4. acrimonious

    acrimonious Custom User Title:

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    The relays are there because there was no indication of the wattage of the fans. If you have the relays you can pull as many watts as your PSU will allow for. I'd like to see my circuit without relays tring to handle a 120mm Delta @ 24W.
     
    acrimonious, 8 Jan 2003
    #44
  5. guzzler

    guzzler What's a Dremel?

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    ok, heres the board for Eagle. It's using TIP122 transistors which switch up to 65W, so no need for relays. If people want to go through it, they're welcome, I give no guarentee of accuracy, just did it in 30 mins, all hand routed =)

    Download Here

    edit: switch connects to pins 1 and 3 on the jumper next to the 4017.

    Q1: BC549
    Q2/3: TIP122

    R1,2,3 are LED limiters, choose your value
    R2,4: 1K

    pads to the left are for a molex

    regards

    g
     
    Last edited: 8 Jan 2003
    guzzler, 8 Jan 2003
    #45
  6. acrimonious

    acrimonious Custom User Title:

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    no chance of an artwork+silk screen post, or are you gonna make me get eagle?:hehe:
     
    acrimonious, 8 Jan 2003
    #46
  7. guzzler

    guzzler What's a Dremel?

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    'fraid your gonna have to get Eagle, sorry... don't actually know how :blush:

    g
     
    guzzler, 8 Jan 2003
    #47
  8. guzzler

    guzzler What's a Dremel?

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    sorry, just found out!!

    [​IMG]

    g
     
    guzzler, 8 Jan 2003
    #48
  9. acrimonious

    acrimonious Custom User Title:

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    ::EDIT::
     
    Last edited: 9 Jan 2003
    acrimonious, 8 Jan 2003
    #49
  10. MarkDixon

    MarkDixon What's a Dremel?

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    Thanks a lot guzzler, that actually makes it easier to follow through...
    And thats a good idea, we should mass produce these things.. Thats sort of what Im doing, this Úber PC I'm building is gonna be a living advert, Im gonna take it to LANS and show shots of it in my local PC shop and if ppl want em I build em.. Gonna mod a Lian-LI PC70 case with windows, CCL's, a custom water cooling setup, the HD LED activity meter and loads of other stuff.. :)
     
    MarkDixon, 9 Jan 2003
    #50
  11. MarkDixon

    MarkDixon What's a Dremel?

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    Just a little ad-on:

    Im gonna use the relays in the curcuit. I like that reassuring sound of the click. And Id feel a lot safer using them.
     
    MarkDixon, 9 Jan 2003
    #51
  12. acrimonious

    acrimonious Custom User Title:

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    The relays also ensure the circuit is not 'half on' due to the 5V standby line.
     
    acrimonious, 9 Jan 2003
    #52
  13. MarkDixon

    MarkDixon What's a Dremel?

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    What size boards are we talking here?? 1x2 inch??
    Any offeres on making one of these things to get me started??
     
    MarkDixon, 9 Jan 2003
    #53
  14. NiHiLiST

    NiHiLiST New-born car whore

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    Plus won't transistors powering such a high wattage device require large heatsinks? Relays obviously don't require them.
     
    NiHiLiST, 9 Jan 2003
    #54
  15. guzzler

    guzzler What's a Dremel?

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    sorry, been at school all day...

    The 4017N is just the package, its just the same as the 4017B, N just signifies the DIL package.

    I'll try and get one made as it stands, to check it works, but I'll have to see when I can get it etched and get parts (prolly get parts sat, etching monday or tuesday hopefully)

    relays are expensive! (£2 at the very least each), not to mention they're power draw, size and the additional discrete components. If you REALLY want a relay circuit, i'll see what I can do, but no promises, sorry... don't really work with relays so i'd have to think about it a bit more...

    the TIP122 doesn't need heavy heatsinking... and really, unless you've got those 24W deltas, you'll prolly never reach 1/6th of the power they need...

    g
     
    guzzler, 9 Jan 2003
    #55
  16. acrimonious

    acrimonious Custom User Title:

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    I'll do a PCB for you give me a few mins.
     
    acrimonious, 9 Jan 2003
    #56
  17. acrimonious

    acrimonious Custom User Title:

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    Here is the circuit i'll be auto-routing. I would hand rout it but i can't be bothered (with all the opto's+relays and what-not):p.

    I've made a few modifications just to make it better for routing nothing major:



    [​IMG]
    You could probably cut down a little but this is the best circuit for the job, less current draw, as many Watts as your PSU and fairly isolated components. PLus no heat, if you ever do whack 6 Deltas on it:hehe:
     
    acrimonious, 9 Jan 2003
    #57
  18. MarkDixon

    MarkDixon What's a Dremel?

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    Does the curcuit for the off indicator LED really beed to be run through an optoisolator/transistor??
     
    MarkDixon, 9 Jan 2003
    #58
  19. guzzler

    guzzler What's a Dremel?

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    no, i wouldn't really bother, just a transistor would be fine, opto isolators are really unnecessary for the whole of this, just don't forget the protection diodes if you want to use the relays...

    g
     
    guzzler, 9 Jan 2003
    #59
  20. NiHiLiST

    NiHiLiST New-born car whore

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    Indeed, back EMF isn't anybody's friend :)
     
    NiHiLiST, 9 Jan 2003
    #60
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