Arduino Forum

Development => Other Hardware Development => Topic started by: Fleetz on Sep 13, 2018, 06:27 am

Title: UNO pin header placement?
Post by: Fleetz on Sep 13, 2018, 06:27 am
Hi,

For my grandson I am designing project PCB with a Arduino UNO onboard. Here is where I am at with it. https://forum.arduino.cc/index.php?topic=565964.0

I am stuck on the physical pin header placement for the UNO.  I have an UNO clone here and Sparkfun blank PCB shield which I thought might be helpful whilst laying out the UNO part of this project, unfortunately the two have physically different header placement between the headers? I now don't know which one to trust?

I have looked on the site here to see if I couldn't find an official header pin header placement with dimensions and have been unable to locate it if it exists?

If anyone can confirm what the distance is between the A0-A5 (6pin) > 5V, 3.3V, GND (8 pin) headers and between the PD0-PD7 (8 pin) > PB0-PB5, GND, AREF, PC4-PC5 (10 pin) header.

The discrepancy is around .9mm enough to be off pitch if I get it wrong.

Appreciate any assistance.

Cheers,

Ian

Title: Re: UNO pin header placement?
Post by: westfw on Sep 13, 2018, 01:55 pm
Can you post a picture?
Uno pin placement, especially the spacing between d7 and d8, is "weird", and won't match a normal 0.1 inch grid, but a sparkfun "proto shield " designed for Arduino should match.
Title: Re: UNO pin header placement?
Post by: hammy on Sep 15, 2018, 04:21 pm
Not an answer you may want  but .... The pin layout of the NANO matches 0.1"  and you can layout boards to accept it with no problems .
Title: Re: UNO pin header placement?
Post by: oqibidipo on Sep 15, 2018, 05:42 pm
The header with pins 8-13 is offset by .040" (1.016 mm).
Totally by accident, in a hurry. (http://forum.arduino.cc/index.php?topic=22737.msg171839#msg171839)