Adding ICSP header pins to an Eagle circuit

Also, I keep talking about holes, I mean not only the thickness of the hole itself, but also the optimal metallic surface size to solder to. How do I calculate that? Are there standard sizes/presets I should be aware of? Anything helps!

Are my other questions clear?

Thank you

2.54 mm is 100mil, which is the same grid you working on.

Pin Thickness: 0.64mm, you need a hole a little bigger than that for the pins. Then the ring size is auto calculated by Eagle.

You have to create a library object that is a 2x3 header to place on the board.

ICSP header is to program a new bootloader. Maybe you want FTDI header?

Hi Michael,

Michael Bazzinotti wrote:

How do I:

 

  a) Create the actual pin headers in software

The part already exists in EAGLE; see the con-lstb library, it is called MA03-2. These DIL headers are quite common parts.

   b) know the correct diameter to specify for those holes.

If you know the pin thickness, since it is square, pythagoras' theorem is used. Or, just use the part mentioned above.

 I would really appreciate a step-by-step process for the actual placement of the pin headers, and how to modify the current state of the board? I really have no idea where to get started.

There is a tutorial. If you follow it entirely, then it will help a lot, because it covers the entire process.

 I mean not only the thickness of the hole itself, but also the optimal metallic surface size to solder to. How do I calculate that? Are there standard sizes/presets I should be aware of?

It depends on the board manufacturer's rules, which they publish or you can request. They will have a rule on the clearance you can have between pads. As far as I know, there is no standard. Usually, the component manufacturer will publish a recommended land pattern. For 2.54mm DIL headers, it is not critical usually, and the con-lstb library may be sufficient.

Am 03.07.2013 05:31, schrieb Michael Bazzinotti:

Hi guys,

 

first post.

 

Let's get right to it.

 

I'm very inexperienced with Eagle Cad, so it would help to be detailed,

don't go overboard though. Hopefully we find a good match.

 

I'm looking to modify a pre-existing eagle Schematic and board combo to

include a 3x2 row of pin headers connected to the microcontroller for

easy hookup to do ICSP. I thought it would be great to try this out to

improve and get acquainted with Eagle.

 

For this project, I am ordering a set of 2-row headers.

 

I took a look at the datasheet for my pin headers. here is a link:

http://www.samtec.com/documents/webfiles/pdf/TSW_TH.PDF

 

I already extracted what I think is the most important information, but

let's review so that you can approve. The two pieces of info I took are

the thickness of the pin itself, and the distance between 2 pins from

their centers.

 

Pin Thickness: 0.64mm

Distance between center of pins (for all adjacent pins,

up/down/left/right): 2.54 mm

 

I think these are the most essential pieces to have. Please correct me

if I'm wrong. Once again, this is my first time doing this.

 

Moving forward, I have some important information that I need to

communicate to Eagle. I want to make, and please pardon my language here

*symantics, I want to place 2 rows of 3 pin headers connected to the

microcontroller as previously stated. Here's a picture of a fabricated

circuit that has these pin headers in place:

 

http://wiki.ladecadence.net/lib/exe/fetch.php?media=programador-funcionando.jpg

 

See at the bottom left of the board.

 

Now, let's take a look at the current image of the board I am working

on, in Eagle:

  http://farm8.staticflickr.com/7398/9189980332_eb8a892732.jpg

As we can see, for the most part a single sided board, with the

exception of a few wires on the top.

 

Now here's where I need help:

I want to learn how to route some tracks from certain pins of IC2 to a

special spot for my new pin headers.

Also, with the information I extracted on my pin headers. How do I:

   a) Create the actual pin headers in software

   b) know the correct diameter to specify for those holes. Also, is

there a certain formula that I can go by for the future when I have the

pin thickness that I can use to always know what to use in the future

for the diameter of the hole?

 

I would really appreciate a step-by-step process for the actual

placement of the pin headers, and how to modify the current state of the

board? I really have no idea where to get started.

 

Thanks,

Bazz

 

--

To view any images and attachments in this post, visit:

http://www.element14.com/community/message/81850#81850

 

Open board and schematic.

The connectors you'll find in the pinhead-lbr.

ADD the connector to your schematic and connect it with NET.

Change now to board and you shall see the new component connected with

airwires.

Place (MOVE) the component and ROUTE the connectins.

--

Mit freundlichen Grüßen / With best regards

Joern Paschedag

Hi Joern,

I found your post most helpful and easy to learn. I have created the board and schematic. Please criticize my work and let me know any areas, if there are any faults, or place to improve.

there is my ICSP:

I had to figure out to display Pin Layer, so that the connections would become valid.

Then I placed the component on the Board file in the only suitable place, added some text to the tPlace layer for the pin numbers labeling, and then routed. Actually, first I auto-routed, then I redid some connections to make them look cleaner.

2 of the vias were auto routed, then I created a third one and made sure to specify the same sizes as the ones that were auto-created. I did this because I have never created vias before, and I was not sure how to size best.the Drill is set to 0.024. Diameters are auto which make it 0.04. Will that be alright you think?

Thanks,

Michael

I need one more confirmation. It has to do with the top of the board. IC2 component was already placed on the board, with the solder plates on the bottom of the board. When I routed my new component, I set the traces for the top of the board, to one of those IC2 pins. does Eagle automatically correctly create a connection for the top of the board and the bottom? The trace at the top of the board must connect to the connections at the bottom. Is that happening? I don't want to order my board and have it incorrect! I will wait for response!

The holes are plated, so yes.