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Noob - Various Questions

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14件のコメント

  • gw1500se

    I figured out 5 with lots of experimenting. Not intuitively obvious and its too bad there are no tutorials that explain that.

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  • Boss .

    From your questions, have you found the tutorials videos (available from Help on the menu bar)?

    The direct link is DesignSpark PCB – DesignSpark Support (zendesk.com)
    The intro video will help First Steps Schematic to PCB – DesignSpark Support (zendesk.com) but there are many others in this section.
    Also this is a recommended list of useful topics.

    One key shortcut you are missing is the "L" command which allows you to change a track layer and it automatically inserts a via.
    At any time you are routing a track, right click and the options will be displayed such as the segment mode to change tracking angles and behaviours.
    Yes changing the pad style of a component may at first seem confusing as it is fixed by the design in the library. Check the 'pad style exception' and it will allow you to edit the pad as required.

    Your last point implies you have made the nets the same somehow in the PCB, use the 'mouseover' to show the nets assigned to the airwires. If they are the same or wrong, go back to the schematic and check there. Assuming correct at the schematic use Forward Design Changes from Tools on the menubar to correct the PCB. All changes to a design must be done at the schematic and then use Forward Design Changes to update the PCB.

    The above should help you progress, but if you have further issues, keep it to one topic with a screen capture to help us understand the issue. Hope this helps.

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  • gw1500se

    Thanks for the reply. I've figured out 2, 3 and 5 but the rest not. I have looked at the tutorials but found nothing to help me.

    Perhaps I was not clear on 7. I am trying to attach a TVS diode between my power track and ground track. The nets are NOT the same. I can connect one net to one pin but when I try to connect the other net to the other pin, it tells me it will change the 2 nets to the same net.

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  • Richard Caldwell

    The error is saying that the component (the round pad) and the diode pad are on separate nets and connecting will result in the make a connection to GND. So check your schematic to ensure they're on the same net.

     

    If possible could you show us the schematic section of how these components are connected together.

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  • gw1500se

    I don't understand. How can both pins on the diode be on the same net? Here is the schematic:

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  • Richard Caldwell

    OK

     

    It looks like you are connecting to the power jack wrong on your PCB. Check the net names of the power jack pads on the PCB pads. Also, check the power jack in the library to ensure the pin numbers match the PCB pads.

    Try this::::

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  • Boss .

    Or the air wire shown between the pads is there as you accidentally connected the left hand pad by the track to the wrong net. This will leave the net airwire shown as connecting to the end of the track and the pad on the right. Use CTRL D and that will update the airwires.
    If still present, from the schematic perform Forward Design Changes and the PCB airwires should be corrected.

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  • gw1500se

    According the the specs, jack 1 (upper left) is tip, thus power. Jack 2 (upper right) is sleeve, thus ground and jack 3 (lower) is the normally open contact which I don't use. So your suggestion can't work. However, I think the problem is the diode which I don't understand. Both pins are designated +5V power. A TVS diode is bi-directional so perhaps that is the reason. However, it does not solve the problem of how to connect it without messing up the nets.

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  • Richard Caldwell

    If both diode pin labels are labeled as +5V then disconnect the right-hand diode PCB pad from the +5V. Then connect the pad to the ground pad of the power jack. It should change the diode pad to GND.

     

    It also sounds like the library schematic and PCB symbols might be wrong, please check them.

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  • Boss .

    Try Fwd Design Changes I suggested just now and see the result.
    If you downloaded the TVS diode it will not have a net assigned to the pads so this is something that needs resolving on your design. I still think you may have routed the track on the left pad to the wrong one. This will assign the net to that pad and hence you will see the error you are reporting and both pins on the same net.

     

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  • gw1500se

    Ah ha! That was it alright. Thanks. Unfortunately in doing that all my time spent with the routing has to be done all over. I added the diode anew to the pcb file so I don't have to reroute. However, how does that effect the diode on the schematic? Are they out of sync now and is there a way to re-sync?

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  • Richard Caldwell

    Just replace the diode in the schematic, then do as Boss said about Fwd Design Changes. It should correct the PCB without rerouting the entire PCB.

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  • gw1500se

    Cool. You guys were a big help. Now I just need to resolve my other issues. I'll submit separate threads for those as suggested by Boss.

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  • Richard Caldwell

    ( ͡° ͜ʖ ͡°)

    Glad we could help.

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