PYBD WBUS connector

The official PYBD running MicroPython, and its accessories.
Target audience: Users with a PYBD
incognico
Posts: 19
Joined: Tue Jun 05, 2018 4:51 am

PYBD WBUS connector

Post by incognico » Mon Mar 25, 2019 2:31 am

Hi all,

I can't seem to find details on the "wbus" connectors on the new D-series boards. Is there a part number somewhere for the mating connector, and some dimensions as to where they should be positioned in relation to the mounting/screw holes?

I am looking to fit a PYBD board onto a custom PCB and based on the description on the store page, I thought this would be clearly documented.
The concept for the D-series of pyboards is a miniature DIP-style form factor useful as both a standalone board and an embedded component for use in final products. On the underside is our WBUS header, a 40+40-pin mezzanine bus connector giving access to all power and IO ports in a highly compact form factor.
Apologies if this documentation is somewhere and I've managed to miss it - I have looked!

mapy
Posts: 9
Joined: Sat Sep 29, 2018 9:49 am

Re: PYBD WBUS connector

Post by mapy » Mon Mar 25, 2019 6:15 pm

Hello all, I have the same need and could not find this info either.

Enviado desde mi WIM mediante Tapatalk


chuckbook
Posts: 119
Joined: Fri Oct 30, 2015 11:55 pm

Re: PYBD WBUS connector

Post by chuckbook » Tue Mar 26, 2019 8:56 am

See:
https://pybd.io/hw/pybd_sfxw.html
To my knowledge there will be mating headers available on the MicroPython store.

alustig3
Posts: 3
Joined: Mon Apr 08, 2019 6:17 pm

Re: PYBD WBUS connector

Post by alustig3 » Mon Apr 08, 2019 6:31 pm

I couldn't find any information in the docs. I ordered these DF40 series Hirose connectors and they fit my pyboard

- 40pin male plug that is on the pyboard: https://www.digikey.com/products/en?keywords=h11624ct
- 40pin female socket that is on the WBUS DIP68 breakout: https://www.digikey.com/products/en?key ... 11625ct-nd

incognico
Posts: 19
Joined: Tue Jun 05, 2018 4:51 am

Re: PYBD WBUS connector

Post by incognico » Wed Apr 17, 2019 7:21 am

Thanks very much for posting this. I searched through hundreds of connector pics/specs and actually ordered the same DF40 ones you linked - but mine haven't arrived yet... so I am very happy to hear yours fit.

alustig3
Posts: 3
Joined: Mon Apr 08, 2019 6:17 pm

Re: PYBD WBUS connector

Post by alustig3 » Mon Apr 22, 2019 6:03 pm

FYI, the connector I linked to before fits, but is very low profile. This can be a problem when attaching a pyboard because there is a µSD card connector on the pyboard's bottom side that is thicker than the DF40 connector and therefore prevents the board from seating completely. The WBUS DIP68 breakout board gets around this by adding a cutout in the PCB for the µSD card connector to poke through. An alternative solution is to use taller DF40 connectors (https://www.digikey.com/product-detail/ ... =290724516).

User avatar
RWLTOK
Posts: 47
Joined: Thu Dec 14, 2017 7:24 pm

Re: PYBD WBUS connector

Post by RWLTOK » Wed Aug 28, 2019 10:45 pm

Now that we know what connectors mate to the D series I would like to know how to place these connectors on a PCB for the PYBD to mate to. I cannot find a drawing that shows the coordinate locations for the connectors. Anyone have a link?

Thanks

Rich

User avatar
mathieu
Posts: 41
Joined: Fri Nov 10, 2017 9:57 pm

Re: PYBD WBUS connector

Post by mathieu » Wed Aug 28, 2019 10:50 pm

RWLTOK wrote:
Wed Aug 28, 2019 10:45 pm
Now that we know what connectors mate to the D series I would like to know how to place these connectors on a PCB for the PYBD to mate to. I cannot find a drawing that shows the coordinate locations for the connectors. Anyone have a link?
This may be helpful: https://github.com/mdaeron/pybd-breakout. Contact me if anything is unclear.

kesterlester
Posts: 11
Joined: Sat Nov 17, 2018 10:04 pm

Re: PYBD WBUS connector

Post by kesterlester » Thu May 07, 2020 7:24 pm

alustig3 wrote:
Mon Apr 08, 2019 6:31 pm
I couldn't find any information in the docs. I ordered these DF40 series Hirose connectors and they fit my pyboard

- 40pin male plug that is on the pyboard: https://www.digikey.com/products/en?keywords=h11624ct
- 40pin female socket that is on the WBUS DIP68 breakout: https://www.digikey.com/products/en?key ... 11625ct-nd
Why do you call it a "40pin" connector when every pyboard-D picture I look at (e.g. this one:
moo.jpg
moo.jpg (67.19 KiB) Viewed 464 times
which is a zoomed in version of a picture taken from https://store.micropython.org/product/PYBD-SF2-W4F2 ) appears to show both 44 pads and 44 gold contacts inside the connector. I say this having noted that there are lots of connector types in the DF40 series which include both 40 and 44 pin options. See for example page 1 of this datasheet. So I am prepared to believe that it *is* a 40-connector connector.

Even the micropython store calls these "Physical electrical connectivity via 24 through holes, and a 40+40 pin mezzanine bus connectors" on https://store.micropython.org/product/PYBD-SF2-W4F2 , but overall I'm clearly misunderstanding something somewhere, because it looks more like 44 to me.

NB: I am aware that some DF40 connectors come with four extra pads for mechanical security. But I think those are slightly separate from the rest which the ones in the above picture are not.

I'm going to get my next board design all wrong unless I can figure out what's happening here.

User avatar
tve
Posts: 210
Joined: Wed Jan 01, 2020 10:12 pm
Location: Santa Barbara, CA
Contact:

Re: PYBD WBUS connector

Post by tve » Fri May 08, 2020 2:14 am

Hmmm, intriguing indeed!
The picture on the digikey page clearly has 40 contacts.
The PYBD schematic clearly has 44 contacts.
If it looks like a 44 pin connector, walks like a 44 pin connector, smokes like a 44 pin connector, it must be a ?

Post Reply