ExpressPCB & ExpressSCH newbie...custom components?

FlyingFishFinger

Hello
After sucessfully finishing my board for Science Fair this spring, I'd like to make some improvements for next year and make it all SMD. I've been looking at ExpressPCB and ExpressSCH which seem reasonably easy to use, however creating custom IC's is a little over my head at the moment. I'm looking to completely integrate a Stamp 2p40 into the board, so as to do away with the big DIP module. I'm a fairly proficient solderer, so I'm not worried about that, but I'm having trouble finding the components that make up a stamp for ExpressSCH. Can anyone point me to a library or someplace I can find parts like the interpreter chip/resonator etc? Or perhaps I'm just missing something here...
Thanks

Rafael

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You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~

Post Edited (FlyingFishFinger) : 7/19/2007 8:44:48 PM GMT

Dgswaner

Fly, Creating custom parts if very easy in Express PCB, but I would defenatelly look for existing parts, I have a lot of the sensors from parallax made up already, let me know if you want them.

look at the help section, on custom parts, it's really easy to make them. I'd be glad to help you if you ran into any issues.

good luck.

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A complex design is the sign of an inferior designer. - Jamie Hyneman, Myth Buster

FlyingFishFinger

Do they have QFP packages I can use for the interpreter chips?

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You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~

Post Edited (FlyingFishFinger) : 7/19/2007 8:57:52 PM GMT

RDL2004

You basically take and existing part/package and change whatever you have to inorder to make a new part. It's much easier than drawing the part from scratch.

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- Rick

Dgswaner

I'd second that, an IC has pins and you set a pin numbers and add a label to each pin, VSS, Vdd or what ever the data sheet says, the program doesn't know what the label means, it just knows where pin 1 connects in the circuit and will check for errors against the schematic. I could make a custom 28pin IC in just a few minutes. it's not complicated at all.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
A complex design is the sign of an inferior designer. - Jamie Hyneman, Myth Buster