double check me

[Chad Gray]

OK if i am reading this right the RTC and TSL2591 share the same input on the PCB correct?

Thanks for any confirmation. I have a bad habit of releasing the magic smoke.

Chad

[brownrb]

I believe the PDF said something about using a Y splitter cable?
Both the TLS2591 and RTC modules I have require 5V, so they share J9 because that is the only header that has 5V (all the others are 3V3)

i think there are now some modules (TLS and RTC) that do work with 3V3, so if you have one of those you could also use the spare I2C headers on J16 and J17

[Chad Gray]

Thanks for the explanation! Makes sense about the 5V. Guess now that i am
getting into these hardware projects i need to start really understanding
what the PCB is doing and how I2C works.

Thanks for teaching me some more!
Chad

On Wed, Nov 17, 2021 at 6:26 AM brownrb brownrb@users.sourceforge.net
wrote:

I believe the PDF said something about using a Y splitter cable?
Both the TLS2591 and RTC modules I have require 5V, so they share J9
because that is the only header that has 5V (all the others are 3V3)

i think there are now some modules (TLS and RTC) that do work with 3V3, so
if you have one of those you could also use the spare I2C headers on J16
and J17

---

double check me
https://sourceforge.net/p/mysqmproesp32/discussion/general/thread/05fec6be83/?limit=25#3d78/7a59

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[Chad Gray]

I also noticed on the PCB there is a J17 and i think 16 i2c-B and A. What are those for? I have not found a reference in the documentation yet.

Thanks!
Chad

[brownrb]

Future expansion
I provided some more headers so that we dont have to redesign the board, so there are rwo extra I2C headers (free, J16, J17 for I2C devices that work at 3V3)

and
J15 which provided 3V3
J14 which is GND