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Single Layer Board With EagleCad — Parallax Forums

Single Layer Board With EagleCad

hcwonghcwong Posts: 38
edited 2005-09-04 21:27 in General Discussion
Dear all,

Can anyone give me some idea how to set the autorouter of EagleCad 4.15 so that the routing is single layer? The top layer will be connected via jumper wires.

I am planning to design·my PCBs using EagleCad and develop the PCB using TTS from Pulsar. I understand that developing·2 layer board with TTS is a bit·tricky as the holes (pad or via) between top layer and bottom layer·is difficult to match. Making 1·layer board is easier but I do not know how to set the autorouter for 1·layer routing.

Thanks in advance.·

Comments

  • Guenther DaubachGuenther Daubach Posts: 1,321
    edited 2005-09-04 14:24
    In the autorouter dialog, set the direction options for all layers to "n.a.", except the one you want to be used for routing (usually, the bottom layer).

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  • BeanBean Posts: 8,129
    edited 2005-09-04 15:37
    hcwong,
    I have made a couple double sided boards using the pulsar TTS. What I do is create two seperate single sided boards with two locating holes on opposite corners (that are not part of the circuit).
    Etch them seperately, then drill the two locating holes on both and use strong double sided tape or glue to put them together.
    Then I drill the circuit holes and put wires through the vias.
    An added benefit is that you end-up with a 0.062" board when your done.
    Bean.

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    ·
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2005-09-04 16:02
    Bean's approach is quite unique. I wonder how it works with DIP sockets and things that fit into a thinner board. That Pulsar TTS must be quite thin to begin with. All I have is Kinsten Photosensitive Positive image boards.

    If you are using the share-ware version of Eagle [noparse][[/noparse]or the $49.00 version] you are somewhat limited in size.

    So....
    Do you really need an auto-router?
    If not, just skip drawing the schematic and draw the board as you want it.
    I really don't have time to keep learning software and redesigning boards according to their way. I just need a ready to print image.

    I have done one single layer and I have .016 width lines running between IC pads. It printed beautifully. My only problem is getting my holes drilled straight [noparse][[/noparse]I may try tapping centers with a center punch before I drill next time].

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  • hcwonghcwong Posts: 38
    edited 2005-09-04 21:20
    Dear Bean,

    I do agree with Kramer that your final board may be too thick for some DIP parts.

    Yes, the Autorouter is an excellent feature. You will love it once you know how to use it. The Eagle Lite is very useful if you are a hobbyist because you will normally make small boards for your hobbies.

    Try·using SMD·chips. You do not need to drill holes. It is not so difficult to solder as it·seems if you know the technique.
    Kramer said...
    Bean's approach is quite unique. I wonder how it works with DIP sockets and things that fit into a thinner board. That Pulsar TTS must be quite thin to begin with. All I have is Kinsten Photosensitive Positive image boards.

    If you are using the share-ware version of Eagle [noparse][[/noparse]or the $49.00 version] you are somewhat limited in size.

    So....
    Do you really need an auto-router?
    If not, just skip drawing the schematic and draw the board as you want it.
    I really don't have time to keep learning software and redesigning boards according to their way. I just need a ready to print image.

    I have done one single layer and I have .016 width lines running between IC pads. It printed beautifully. My only problem is getting my holes drilled straight [noparse][[/noparse]I may try tapping centers with a center punch before I drill next time].

    Post Edited (hcwong) : 9/4/2005 9:27:34 PM GMT
  • hcwonghcwong Posts: 38
    edited 2005-09-04 21:27
    Dear Guenther,

    Thanks for the pointer.

    I did that but it will not autoroute all airwires. I guess that I need to manual route the remainder of the airwires.
    Guenther Daubach said...
    In the autorouter dialog, set the direction options for all layers to "n.a.", except the one you want to be used for routing (usually, the bottom layer).

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