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Overlays for Chipamp.com LM3886 boards?

Hogwild

Member
2010-10-08 4:46 am
Bill_P:

Thanks, but not quite. I'm still an extreme newbie (even after all my efforts and travails). But I believe an overlay shows the circuit traces on the bottom overlaid with the component names and/or values on top. In other words, both sets of graphics/text on the same surface.
 
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Hogwild

Member
2010-10-08 4:46 am
Chipamp.com made it clear to me that they do not have any overlays for their products.

It was a nice thought, though.


When you place the parts you don't need to see the copper pattern, only where to put the part. You haven't try to contact the company you bought the pcb's from?

BTW: You can also look at the physical boards if you want to know how the copper tracks look like.
 

Hogwild

Member
2010-10-08 4:46 am
From:

PCB Layers | BitWeenie

QUOTE:
"Overlay or silkscreen layers provide, among other things, the text designators for your components on the top and bottom layers. If utilizing these layers, separate files should be provided to the fabricator for the top and bottom overlays. There is no need for overlays on internal layers (you’d never be able to see them!). If you don’t care to have text on your board, these files are not necessary. However, text is immensely helpful, especially when debugging boards in the lab."
 
They are called overlays because they are the last layer applied during the manufacturing process. Overlays DO NOT depict traces. They are meant to show component designators and other information like model, version, etc. Most PCB CAD software also include the part's footprint and optionally, its value.
I have assembled several of the Chipamp.com PCBs and all of them, without exception, had the overlay, that is, the white silk screen layer with components' footprint and designator.
What exactly are you missing? What kind of help do you need?
 

Hogwild

Member
2010-10-08 4:46 am
To be honest, I don't know exactly, as someone is helping me with this. But what you describe shows the component designators on one side and the traces on the other side. I think what I'm looking for is both on one plane.

EDIT: OR both layers, so that I can superimpose one on top of another
 
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The problem appears to be your understanding of the language. I made it clear in my posting: Overlays DO NOT depict traces.
You should take a look at the schematic on page 3 of the User's Guide, available at Chipamp.com web site.

http://www.chipamp.com/docs/User%20Guide%20-%20LM3886%20Kit.pdf

It tells you the value of each component by its designator: R1: 1K, R2: 22K, R3: 680R, etc. Those designators are clearly marked on the PCB.

http://chipamp.com/beta2/wp-content/uploads/IMG_08171-e1386797539186.jpg
 

Hogwild

Member
2010-10-08 4:46 am
I did say that I'd already looked through the manual, and it does not contain what I need. Thanks anyways.


The problem appears to be your understanding of the language. I made it clear in my posting: Overlays DO NOT depict traces.
You should take a look at the schematic on page 3 of the User's Guide, available at Chipamp.com web site.

http://www.chipamp.com/docs/User%20Guide%20-%20LM3886%20Kit.pdf

It tells you the value of each component by its designator: R1: 1K, R2: 22K, R3: 680R, etc. Those designators are clearly marked on the PCB.

http://chipamp.com/beta2/wp-content/uploads/IMG_08171-e1386797539186.jpg
 
P-A,

A few posts ago I asked the same thing: "What kind of help do you need?". Hogwild did not answer. We don't know who is the person behind the name used in this forum. This hobby can be daunting for some, especially if the person has difficulty expressing himself/herself, as it gets in the way of us providing assistance.
 

Hogwild

Member
2010-10-08 4:46 am
Peranders:

Thanks for the solid advice. I actually already built 4 of them. My friend says the overlays would come in handy for some troubleshooting.

Thanks for what's already been posted. That should eliminate about half the work, I'd think.



Hogwild, I'll guess that you plan to make you own pcb and you don't know how but apparently you have a friend who can help you.

Just a hint, chipamp's pcb is not that expensive and the chance to succeed is rather high.