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Schematic Drawer ?? — Parallax Forums

Schematic Drawer ??

gambrinogambrino Posts: 28
edited 2009-03-21 09:22 in Propeller 1
Hello ,
where i can found a free schematic drawing program that includes Propeller Ship (44-Pin QFP Chip)?
thank you in advance

Comments

  • Ken PetersonKen Peterson Posts: 806
    edited 2008-10-30 15:47
    Are you just doing schematics, or do you need to do PCB layout? Do you need a standard format? Do you need to do any analysis?

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  • gambrinogambrino Posts: 28
    edited 2008-10-30 15:48
    Hi Ken , just schmetics drawing without PCB layout and without any analysis
  • CannibalRoboticsCannibalRobotics Posts: 535
    edited 2008-10-30 18:20
    Go to ExpressPCB.com and download their tool suite. It is really easy to use and build your own components.
    I have a schematic symbol for the Propellor that I'll be glad to post (but the server is not letting me do that at the moment). The PCB symbol library has the 44 pin QFN pad already loaded. I can send it when I get back to the office this PM.
    Jim-

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    Send cash and signature to CannibalRobotics.

    Post Edited (CannibalRobotics) : 10/30/2008 8:31:55 PM GMT
  • RDL2004RDL2004 Posts: 2,554
    edited 2008-10-30 19:37
    Eagle can do schematics and board layout. There are libraries available for the Parallax products including the Propeller (all three packages are in the library).

    www.cadsoftusa.com/download.htm


    attachment.php?attachmentid=56495


    edit: The free version limits the schematic to one sheet and the board size is limited also.

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    Post Edited (RDL2004) : 10/30/2008 7:48:32 PM GMT
    propeller.png
    254 x 370 - 4K
  • CannibalRoboticsCannibalRobotics Posts: 535
    edited 2008-10-30 20:28
    There are no power or ground pins on pic below?

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  • LeonLeon Posts: 7,620
    edited 2008-10-30 20:48
    They are probably implied, to reduce clutter. They will appear in the PCB if the correct connections to the power and ground nets are made in the schematic.

    TinyCAD is supposed to be quite good: tinycad.sourceforge.net/

    Leon

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  • Timothy D. SwieterTimothy D. Swieter Posts: 1,613
    edited 2008-10-31 00:57
    One way of doing ICs in Eagle, and some other electrical design software, is to break the IC into the Power pins and the other pins. This can reduce clutter on a schematic by placing all the power related components in one part of the drawing and all the logic components as needed. Sort of like talking a multiple gate IC adn breaking it into parts across a drawing.

    I can vouch for using Eagle and using the Propeller Library or Parallax library.

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  • ElectricAyeElectricAye Posts: 4,561
    edited 2009-03-20 20:24
    CannibalRobotics said...
    Go to ExpressPCB.com and download their tool suite. It is really easy to use and build your own components.
    I have a schematic symbol for the Propellor that I'll be glad to post (but the server is not letting me do that at the moment)....

    Cannibal,

    did you ever post this ExpressPCB schematic symbol for the Propeller? I can't find it anywhere and if you still have it, I'm sure that would make a good quick starting point for a lot of people (including me.... smile.gif )

    thanks,
    Mark
  • smbakersmbaker Posts: 164
    edited 2009-03-20 20:50
    Diptrace also has a propeller symbol. I'm an Eagle user, but have just recently started playing with DipTrace. It's taking a little time to learn the new software, but so far I like the user interface and the overall design better. The pricing options seem better, and the company itself·seems lot more modern. I asked a few simple pre-purchase questions of the US Eagle distributor and all I received back was a spreadsheet that I am apparantly supposed to "fax" back. That's just so early-90's. DipTrace has a nice website with a paypal button right there.

    I'd suggest downloading evaluation copies of the various programs and playing with them for a bit before settling on one. Eagle, Diptrace, and ExpressPCB all have freeware versions that you can try. Make a hasty decision now, and you may end up in my situation -- with several designs that are going to have to be redone in the new software if I decide to make the switch.
    ·
  • EricGarlicEricGarlic Posts: 41
    edited 2009-03-20 22:21
    Anybody got a recommendation for a PCB manufacturer in the UK - I need to produce a number of prop circuit boards. Cheers
  • ConeheadConehead Posts: 12
    edited 2009-03-20 22:56
    I used Diptrace for a Prop based board and loved it.· Tried Eagle and wasn't a fan, but a lot more people use that than Diptrace.
  • grasshoppergrasshopper Posts: 438
    edited 2009-03-20 23:05
    I use nationals multisims. Its easy to use and powerful

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  • LeonLeon Posts: 7,620
    edited 2009-03-20 23:29
    EricGarlic said...
    Anybody got a recommendation for a PCB manufacturer in the UK - I need to produce a number of prop circuit boards. Cheers

    I use PCB-Pool and PCB Train:

    www.pcb-pool.com/ppuk/info.html

    www.pcbtrain.co.uk/

    Leon

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  • SapiehaSapieha Posts: 2,964
    edited 2009-03-21 02:52
    I use Proteus module ISIS for Schematic/Simulation and Proteus module ARES for PCB

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    Sapieha
  • EricGarlicEricGarlic Posts: 41
    edited 2009-03-21 08:28
    All - thank you for your responses. I've made my own boards in the past but I'm finding that I have less time and I do not fancy the having the chemicals hanging around.

    So as to contribute something about to the original thread I have used FreePCB & Eagle. All packages take a bit of getting use to. Many moons ago I used PCBWizard. I think there is an opportunity out there for someone to create a user-friendly schematic & layout tool.

    Eric
  • virtuPICvirtuPIC Posts: 193
    edited 2009-03-21 09:22
    I'm a fan of AACircuit. Yes, it's only for 'drawing' not for developing. But you don't need any graphics. You only need a fixed pitch font.

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