Solder points without components/Measuring placements

[my_list_address]

I want to make a small adapter PCB so that I can attach the wider spaced LEDs on the left in the photo below.
(the adapter PCB will go between the blue PCB and the LEDs).

 

1) which "component" do I need to add for the holes? Or do I just place vias directly to the board?

2) obviously I have to place both rows at specific distances. Once I have the pin spacing measurements of the LEDs (and the much narrower holes in the blue PCB in the photo) as well as the spacing between each LED -how do I set this up in Eagle so I can put the vias in their exact right position?

[jorge_garcia]

Hello @my_list_address,

I hope you're doing well. You can specify exact coordinate in the command line. Activate the via command then in the command line you can specify exact locations by typing the following

(x-coord y-coord)

then press enter. x-coord and y-coord would obviously be the values of the location you want to put the vias at.

Let me know if there's anything else I can do for you.

Best Regards,

[my_list_address]

Thanks for your reply.

Unfortunately that didn't work with my version of Eagle (7.7.0. Mac). Here's a simple illustration on what I'm trying to achieve. It's going to be a simple PCB solely for the purpose of joining together the wider spaced LEDs with another PCB (which was designed for more narrow spaced LEDs):

I just need to find a way to place those vias accurately with the above spacing distances.

[jorge_garcia]

Hello @my_list_address,

I hope you're doing well. For this example you can get most of the vias on spaced correctly by just using a 0.1 grid, that will take care of 8 of the 12 vias. For the remaining 4, you would do a little math to calculate the XY locations of those 4 vias, then you would use the method I recommended in my previous post.

Let me know if there's anything else I can do for you.

Best Regards, 

[my_list_address]

Ah! Yes, the grid.

I think I misunderstood about the x and y-coordinates as itwas a little over my head, but I will try that.

In the meantime, before your second reply I experimented a bit with the grid and may have found another solution.

I first set the grid to 0.1" and placed all 20 vias on the right side of the PCB (they all have 0.1" spacings) as the easily snapped to each grid-intersection. I also added 2 vias with the same spacing at the bottom of the left row. That was the easy part.

Next I changed the grid to 7mm. Now the vias all moved away from their existing cross-sections, and I'm not sure if I've done it more complicated than need to be, but I first selected all the vias using the "Group" tool, then using the "Move" tool moved them all so that the bottow two vias (the two rows) lined perfectly up with a horizontal line (and one of them with a vertical/horizontal intersection). I held down the ALT key along with the mouuse to finely adjust this and also zoomed in as closely as I could (to see accurately).

To fix the row on the left I selected and moved those 2 vias so that the bottom one would snap in place in the bottom intersection.

Finally I used the "Copy" tool to copy the group of two vias in the leftmost row, and placed the copy with the bottom-most one snapping into place at the next 7mm intersection. Repeating this last procedure I ended up with all 20 vias on the left hand side.

It appears correct to me, but is it?

[jorge_garcia · Accepted solution]

Hi @my_list_address,

You can confirm the locations by clicking on a single via and looking in the inspector to confirm it's exact location.

Let me know if there's anything else I can do for you.

Best Regards,

[my_list_address · Accepted solution]

Thank you 😀