JST-SH 4-pin connector & STEMMA QT colors

General project help for Adafruit customers

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Post Reply
User avatar
aalm
 
Posts: 4
Joined: Sat Mar 02, 2024 3:16 am

JST-SH 4-pin connector & STEMMA QT colors

Post by aalm »

Hello,
Im designing a PCB and Im going to use JST SH 4-pin connectors. Im planning to use your STEMMA QT cables.
I would like to follow your coloring.
Red - 3.3VDC Power
Black - Ground
Blue - I2C SDA Data
Yellow - I2C SCL Clock

I cannot find any reference to what numbers the pins have. I have the footprint attached.
Can you please tell me what color is on what pin.
Thank you very much!
Attachments
Screenshot 2025-02-04 at 17.39.26.png
Screenshot 2025-02-04 at 17.39.26.png (84.81 KiB) Viewed 13 times

User avatar
adafruit_support_carter
 
Posts: 31635
Joined: Tue Nov 29, 2016 2:45 pm

Re: JST-SH 4-pin connector & STEMMA QT colors

Post by adafruit_support_carter »

The STEMMA QT spec is here:
https://learn.adafruit.com/introducing- ... ical-specs

However, be careful with pin numbering. I think the Adafruit created Eagle PCB parts may not follow JST pin numbering order in all cases - so may be reversed.

Carefully looking at a STEMMA QT cable might help:
https://www.adafruit.com/product/4209

And compare that to JST SH spec:
https://www.jst-mfg.com/product/index.php?series=231
stemma_qt.png
stemma_qt.png (89.84 KiB) Viewed 11 times

Post Reply
Please be positive and constructive with your questions and comments.

Return to “General Project help”