PCB image file -best format for forum

Hi,
My first post and my first PCB design. What is the best image type file to post on this forum so I can get some advice on the PCB layout and the circuit design?

Thanks

Your best bet is to upload the sketch (the .fzz file, upload is 7th icon from the left in the reply menu.) That gives us the complete sketch to check over.

Peter

PCB TT version 2.1.fzz (23.1 KB)

Hope this works.

Yep, it worked fine. Your circuit passes DRC (in pcb view Routing->Design Rules Check) so should be fine I expect. You could eliminate the via by routing that trace on the top layer but it shouldn’t really matter that much.

Peter

Thankyou for that. Next test is getting the board manufactured.

It should be OK, assuming the connections are correct. I’m a little concerned that one of the parts (looks like the MK42D Interface) has unusually small holes:

(this is from the gerber drill.txt file.) T101 is likely the via and should be small, but T108 which looks to be the MK42D is only 0.028in which is fairly small (an IC is typically 0.030in for comparison.) The Pololu A1 that it appears to be based on has 0.030 holes so it may be OK (a 0.1in header has a 0.038in hole typically.)

; NON-PLATED HOLES START AT T1
; THROUGH (PLATED) HOLES START AT T100
M48
INCH
T1C0.086614
T100C0.035000
T101C0.015748
T102C0.038194
T103C0.030000
T104C0.031497
T105C0.036000
T106C0.037639
T107C0.042000
T108C0.027559
T109C0.040000

Other than that the gerbers look fine (displayed here in gerbv)

Peter

I used the polu board to get the pin spacing as the interface board is a substitute for the motor control board (the stepper motor has a controller attached to the motor so it has an adapter connection instead). I will be using female header pins to plug the interface board in to so I assume the header pins will need to have 0.030in holes so I will change them to that.

Ooops. I should have asked how I edit the hole sizes.
thanks.

PCB TT version 2.1.fzz (22.9 KB)

I made some changes to the arduino pins in the code so the via hole is now removed. I still need to edit the hole sizes for the interface, how do I do that?
John

To edit the hole sizes you generally need to edit the part (which isn’t easy.) If you need a header you are likely best to replace the motor driver with a header from core parts like this:

the header will have the appropriate 0.038in holes by default (and save you some space on the board.)

Peter

PCB TT version 3.1.fzz (23.4 KB)

Modified as advised. Thanks Peter. I am waiting for the stepper motor to arrive from China. When it arrives I will need to check the spacing of the plug board pins against the headers position. Can the Fritzling system produce a 1:1scale printout of the PCB?

John

Yes, export as an image should do the trick I believe. .

Peter

Printing via “File → Print” should do it. It will either produce a PDF or directly send it to your printer, depending on your system settings. If it is not to scale (and your system does not apply any additional filters, like printing two pages on one) then this would be a bug.