place components on bottom layer without mirroring?

Hey guys,

I'm sorry for being a noob but every word on the subject I find suggests using the mirror tool.

I've created my pcb layout which has zif eprom sockets on the top layer and a DIL28 IC socket which should be underneath the zif socket (slightly offset a little)

So in essence the components are kinda stacked.

if I choose mirror it flips the IC socket around which just doesnt seem right to me.

also after trying to mirror the ic socket i would have expected to see the solder pads for it to be on the top but teh solder pads for the zif socket on the bottom.

am I being a total idiot?

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0 Former Member over 11 years ago

thanks guys I'm starting to get my head around it a bit more after your replies.
Lorenz, to what you said about bending up chip legs, I'm not actually putting a chip into the underside ic socket, I have made some flat ribbon cables. so that shouldnt be an issue..?

So just to be sure, mirroring a part doesnt actually make it place pads on top or bottom, wherever drilled pads are there will be conductors on both sides of the board, and as you said, they are plated through (via's?)

Just in case you were wondering, I created a prototype of a hacked drum machine, and a fair few people want one, thing is, this one took me an absolute age to make due to an absolute mountain of wiring as everything is connected by hand soldering.
I'm trying to get this board made so that I can speed up the making process...
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0 autodeskguest over 11 years ago in reply to Former Member

On Fri, 21 Feb 2014 15:05:49 GMT, Brad Holland
<noreply-223697@element14.com> wrote:

So just to be sure, mirroring a part doesnt actually make it place pads
on top or bottom

Actually, it does. A through-hole part has pads on both sides anyway,
so the point is moot. But if you mirror a surface mount part, the pads
WILL be moved to the other side.

What you must remember is that when you look at the bottom layer, you
see it as viewed from the top. In other words, you will look at the
underside if the parts that are placed on the bottom layer.

This might sound a bit tricky at first, but it's actually easier done
than said.
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RoRo
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0 Former Member over 11 years ago in reply to autodeskguest

I think i get you.
You mean you have to look at it imagining you have x-ray specs on, right? lol
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0 autodeskguest over 11 years ago in reply to Former Member

Am 22.02.2014 15:00, schrieb Brad Holland:
I think i get you.
You mean you have to look at it imagining you have x-ray specs on,
right? lol

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Yep

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Mit freundlichen Grüßen / With best regards

Joern Paschedag
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0 autodeskguest over 11 years ago in reply to Former Member

Am 22.02.2014 15:00, schrieb Brad Holland:
I think i get you.
You mean you have to look at it imagining you have x-ray specs on,
right? lol

--
To view any images and attachments in this post, visit:
http://www.element14.com/community/message/104522

Yep

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Mit freundlichen Grüßen / With best regards

Joern Paschedag
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