A happy new year to all on this forum ! A prosperfull beekeeping and building.
The 2.45V is what i had in memory when i tested these chinese HX711 boards. I have to check on one to confirm if this was the voltage i found on the cell…
Yes, as far as i remember, my prototype is using the on board PNP to switch a 5V supply. I can’t remember if i used this PNP to switch the output voltage or the ENABLE pin of a regulator. I think it’s this later solution.
My fault… i didn’t redraw the schematic after all my tests. I trusted my memory which i shouldn’t do anymore ! :-(
Thanks for the link to the datalogger. I already came across.
I modified my sketch and desactivated the A/D converter and brown-out, and my current dropped to 150uA.
I don’t have a spare digital pin to try to supply the DS3231. I will try to find a solution. But 'im not sure if it’s really worth it. The GSM is consuming a lot more each hour !
BTW, i was talking of a replacement for the DS3231 like the PCF2127 not a DS1307.
I’m actualy using 2 pins for each HX712. To free some pins, it might be possible to use one common pin for all four DOUT signals and one pin for each of the PD_SCK lines.
But i’m not sure it’s a good solution… It would wake up all 4 chips at the same time and supply all cells, consuming much more…
Have you made some tests with the DC filters you suggested ? What about the voltage drop across the resistors ?
Thanks a lot,