7/09/2014
Embedded Systems Design ELEN90066
Lecture 12 PCB marking
David Jahshan
Notes From Last Lecture
• When picking a component ensure that – Does it do what you need it to do
– You have the ability to fabricate a PCB for it
• BGA components are hard to solder
• Require multilayer PCBs
– Are available in the quantity you require
• How to use parametric searches
PCB Marking
• We will have a quick look at the marking sheet, again you will be filling it out and the demonstrators will be verifying it.
• Marking this week.
• PCBsaredueattheendoftheweekonthe
8am Sunday the 14th of October.
• Absolutely no extensions!
PCB Submission
• ThePCBsubmissionsiteisnowreadytotakeyour submissions:
• http://iridec.com.au/ELEN90066/ Pass phrase: letmesubmitmypcb
• Passphraseiscasesensitiveandhasnospaces.
• Itisa4stepprocess.
• 0.Saveyourfileinthecorrectformat 1. Login
2. Upload
3. Download file and Check
4. Click Submit (do this only once)
PCB Submission Mistakes
• 1. Once your file has passed without any errors and you have visually inspected the file generated and you are happy with it you must
click “Submit” else the file will not be saved. The “Submit” button is in the same location as the “Try Again” button when you have errors. You can upload and check the file as many times as you like, but you can only submit once.
• 2. Make sure you upload the ASCII version of the file instead of the Binary version. Remember to File->Save Copy As->Save as type->PCB ASCII File. Give the file a different name and make sure you upload that file.
• 3. Read the error logs at the bottom of the page. It tells you what the error is and how to fix it.
• 4. You should run DRC on the original file, DRC will not run correctly on the generated file as all nets are stripped from this file.
PCB submission Mistakes
• 5. You should visually inspect the generated file to make sure that all is how you think it should be, especially all your ground planes. If you had accidentally used the wrong type of polygon (not hatched) it will not appear. What you see is what will be built.
• 6. Make sure your PCB does not have anything past the edges of the PCB. If you have a components silkscreen overhanging, double click on the component, turn off lock primitives and then move the silkscreen back over the PCB area.
• 7. Make sure you do not delete the outline of the PCB on Mechanical layer 1.
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7/09/2014
Parametric Searches
• A couple more examples of parametric searches to find components:
– Resistors
– Diodes
– MOSFETs
– Microcontrollers
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