as7341 breakout schematics and components

Wearable electronics: boards, conductive materials, and projects from Adafruit!

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
sparky57
 
Posts: 1
Joined: Mon Aug 01, 2022 12:21 pm

as7341 breakout schematics and components

Post by sparky57 »

Hi,
I am trying to understand how the AS7341 works. I have purchased one and am extremely pleased with its accuracy. I am trying to make a similar wearable device using the AS7341 and have been looking into the schematics provided by Adafruit :
https://learn.adafruit.com/adafruit-as7 ... /downloads

My question is regarding the BSS138 component. Is there more information that could be provided like a datasheet? That particular component is out of stock, and I wondered if there is an alternative way of handling this functionality. Thank you!

User avatar
adafruit_support_carter
 
Posts: 29056
Joined: Tue Nov 29, 2016 2:45 pm

Re: as7341 breakout schematics and components

Post by adafruit_support_carter »

They are transistors being used for bi-directional level shifting of the I2C lines.

If you don't need to deal with mixed 3V / 5V logic, you do not need that.

More info in this app note:
https://cdn-shop.adafruit.com/datasheets/an97055.pdf

Locked
Please be positive and constructive with your questions and comments.

Return to “Wearables”