Pico board what is the pitch between 0.1" pins

[espruino-discuss3]

Posted at 2015-06-01 by LawrenceGrif

Forgive my ignorance but I've got someone designing a board to host a Pico, as this is way beyond me!! The board designer is asking for pitch between 0.1" pins which seems to be 12mm. I can't find any definitive info on this?

Thanks
Lawrence

---

Attachments:

• pico_pitch.png

[espruino-discuss3]

Posted at 2015-06-01 by @gfwilliams

Is the board designer using Eagle CAD? If so there's actually a selection of footprints available at: https://github.com/espruino/EspruinoBoard/tree/master/Pico/Component

(he might even be able to import the library)

But the 0.1" pins are on a 0.1" grid (so 2.54mm). The distance between them is 5x0.1" = 12.7mm - you could fit a 4x0.1" pin strip exactly in the gap between the two rows of pins.

Same with the 0.05" pins, they're on a 0.05" grid, so 1.27mm - and they're in line with the last 0.1" pin in the row

---

Posted at 2015-06-01 by LawrenceGrif

Gordon don't know what he's using to design.
But many thanks for this.

Once I've got the board field tested I will share the gerber files.
It's for my exact needs for industrial senors but has XBEE header, relay and big screw terminals.

---

Posted at 2015-06-02 by DrAzzy

I recommend using the castellated pads to mount it, not pin header, if you need to use the 0.05" pins. The pins are not the same length! In the process of designing my project boards (background http://forum.espruino.com/conversations/265026/?offset=50 buy https://www.tindie.com/stores/DrAzzy/ ), this was recognized - only after the first run was in hand.

---

Posted at 2015-06-02 by @gfwilliams

Yes, if they're going into sockets it's pretty annoying, but if you're soldering it to the board then you won't really have problems as you can just sink the pins in a bit more.

---

Posted at 2015-06-02 by LawrenceGrif

Thanks for the heads up on this.

---

Posted at 2015-06-02 by @gfwilliams

If you did want to be able to remove the Pico (while using the 0.05" pins on the end) then you can get surface mount half-height sockets where the pins stick through holes in the PCB itself.

Picture below but I don't know any part number I'm afraid...

You may also be able to get 0.05"/1.27mm 'stackable' sockets, which would give you enough extra height.

---

Attachments:

• BT2150 SMT With CAP.jpg