2022-01-14, 09:09 PM
(2022-01-14, 06:17 PM)Paul M Wrote:(2022-01-13, 09:25 PM)baltika_no_9 Wrote: “…never the 5V…”. Not necessarily.
The particular sensor the OP is referring to can be powered just fine from a power supply in the range 3.3 to 5.5V It has an onboard regulator to deliver the 3.3V.
This is certainly true but please take a look at the schematic. https://www.waveshare.com/w/upload/8/86/...ematic.pdf
If the 5v supply (vcc) is used the SDA and SDA pins will have pull-ups to the 5v supply which will make them out of spec. for the pi’s gpio pins.
Use the 3.3 volt supply!
Paul
You're quite right Paul, thank you. On that basis then connection to the 3.3V supply has to be the preferred option.
Oddly, for the latest version of that Waveshare device they give an example of how to connect it to the PI and that clearly shows power being provided by the 5V line! https://www.waveshare.com/wiki/10_DOF_IMU_Sensor_(D)
See under the Raspberry Pi Guides tab.
Although it's a slightly different device there are still pull ups to Vcc as is the case for the one we were originally talking about.
How odd
All the best