MicroPython Forum (Archive)

I have started a thread INA226 on the Github forum

Oh, I'm sorry, I noticed just now that I have added some confusion to this discussion. I found this topic when looking for an INA226 lib. And I found yours, Chris. Somewhere under this topic there is a mention of the 226, I mentioned it too in my post. But you, Chris, spoke of the 219, I think? Ever...

Hi Chris, on page 16 you have a table where a resolution of 2.5uV is mentioned for the shunt register. Also on page 24 they say Full scale = 81.92mV and LSB = 2.5uV I do not see where you find 10uV on p.5. Anyway, this datasheet is a mess! Totally confusing! Probably you should raise an issue agains...

I discovered a bug in the library: @property def shunt_voltage(self): """The shunt voltage (between V+ and V-) in Volts (so +-.327V)""" # no, +-80mV! value = _to_signed(self._read_register(_REG_SHUNTVOLTAGE)) # The least signficant bit is 10uV which is 0.00001 volts # NO!! It is 2.5uV # return value...

Now as I wanted to document my work I noticed that I had done an error when calculating the Calibration value. I have Rs = 0.002 Ohm and Imax = 15A. That gives 0.5mA (rounded) for Current_LSB and 12.5mW for Power_LSB. From that I deduce CAL = 5.12mV / (Current_LSB) = 5.12/ (0.5 * 0.002) = 5120 With ...

Hi Chris, thanks a lot for the INA226 driver, and especially for the example in the code. If I had seen that at the beginning I could have progressed much faster! The datasheet is a pain to read, very confusing, mixing register values and electrical values, neglecting the units etc. Once I had disco...

Thanks for your driver! I got it to work with my chip. However I have not enough knowledge (or maybe it is not possible / not easy) to make the Pico work like a PicoW, with the difference that it would be connected by cable. Not to speek of doing MQTT ... What would be needed is what is in the netwo...

@ujur007
Have you got your sensor to work?
I have just now looking at a TLI4790 I had lying around and was wondering if there is a lib for it.

For my Analog logger project I always use this sequence:
- open file
- write data
- close file.

The idea was to avoid corrupt files.
Is there any inconvenient when doing it like this with an SD card?

That's what I thought. So it is not needed.