Feedback own environmental sensor board

fritzrichter
Posts: 2
Joined: Thu Feb 04, 2021 9:45 am

Feedback own environmental sensor board

Postby fritzrichter » Fri Aug 30, 2024 10:54 am

Hi guys, I am planing to create my first PCB for a grow tent, I added three sensors including SCD-30, SHT30 and MLX90614. Attached two pictures of the board. Do you have any recommendation or improvements?

Feedback very welcome :)

Best
fri
Attachments
env_01.png
env_01.png (257.21 KiB) Viewed 1245 times
env_02.png
env_02.png (237.17 KiB) Viewed 1245 times
env_03.png
env_03.png (504.8 KiB) Viewed 1245 times

selcuk
Posts: 9
Joined: Sun Apr 28, 2024 1:08 pm
Location: Turkey

Re: Feedback own environmental sensor board

Postby selcuk » Sun Sep 01, 2024 11:40 am

So, you are planning to use the I2C bus over a cable. There is a possibility that clock line effects the data line. When you drive the clock line to ground strongly, it causes glitches on the data line via capacitive coupling while data is at high level through the pull up resistor. You may want to separate clock and data on the cable even if they are next ot each other on the connector.

Check section 16.3 "Wiring pattern of the bus lines" in this document.

https://www.i2c-bus.org/fileadmin/ftp/i ... n_1995.pdf

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