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PYBD WBUS connector

Posted: Mon Mar 25, 2019 2:31 am
by incognico
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!

Re: PYBD WBUS connector

Posted: Mon Mar 25, 2019 6:15 pm
by mapy
Hello all, I have the same need and could not find this info either.

Enviado desde mi WIM mediante Tapatalk


Re: PYBD WBUS connector

Posted: Tue Mar 26, 2019 8:56 am
by chuckbook
See:
https://pybd.io/hw/pybd_sfxw.html
To my knowledge there will be mating headers available on the MicroPython store.

Re: PYBD WBUS connector

Posted: Mon Apr 08, 2019 6:31 pm
by alustig3
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

Re: PYBD WBUS connector

Posted: Wed Apr 17, 2019 7:21 am
by incognico
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.

Re: PYBD WBUS connector

Posted: Mon Apr 22, 2019 6:03 pm
by alustig3
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).

Re: PYBD WBUS connector

Posted: Wed Aug 28, 2019 10:45 pm
by RWLTOK
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

Re: PYBD WBUS connector

Posted: Wed Aug 28, 2019 10:50 pm
by mathieu
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.

Re: PYBD WBUS connector

Posted: Thu May 07, 2020 7:24 pm
by kesterlester
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 270 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.

Re: PYBD WBUS connector

Posted: Fri May 08, 2020 2:14 am
by tve
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 ?