On 14/05/2026 18:08, druck wrote:FWIW my rpi4 is able to give low voltage warnings, seemingly reliably.On 13/05/2026 14:06, The Natural Philosopher wrote:That is probably because you have not understood the first thing about how a PI PICO W is constructed.On 13/05/2026 12:12, druck wrote:>On 12/05/2026 14:04, The Natural Philosopher wrote:SighI measure at the far end of the chain>
How? Multimeter, USB power measuring dongle, oscilloscope.
>
>
The Pi PICO W has three ADCs on board and one is connected directly
to VSYS by a voltage divider. I transmit that data every time the
device successfully activates.
I'm not sure I trust something to measure it's own voltage, when it
might be experiencing low voltage.
>
It has its own onboard buck/boost regulators and the ADC is driven from a stabilised 3V line
The rest of the chip runs on a less well regulated 3.3V.
The chip runs down to 1.8V
The ADC is not set up to 'measure its own voltage' but that of the incoming voltage TO the chip.
| Date | Sujet | # | Auteur | |
| 11 May 26 |  PI PICO W minimum voltage.. | 12 | The Natural Philosopher | |
| 11 May 26 |  Re: PI PICO W minimum voltage.. | 2 | David Taylor | |
| 11 May 26 |    Re: PI PICO W minimum voltage.. | 1 | The Natural Philosopher | |
| 11 May 26 | Re: PI PICO W minimum voltage.. | 9 | Computer Nerd Kev | |
| 12 May 26 |  Re: PI PICO W minimum voltage.. | 8 | The Natural Philosopher | |
| 13 May 26 | Re: PI PICO W minimum voltage.. | 7 | druck | |
| 13 May 26 | Re: PI PICO W minimum voltage.. | 5 | The Natural Philosopher | |
| 14 May 26 | Re: PI PICO W minimum voltage.. | 4 | druck | |
| 14 May 26 | Re: PI PICO W minimum voltage.. | 3 | The Natural Philosopher | |
| 14 May 26 | Re: PI PICO W minimum voltage.. | 2 | Pancho | |
| 14 May 26 | Re: PI PICO W minimum voltage.. | 1 | The Natural Philosopher | |
| 13 May 26 | Re: PI PICO W minimum voltage.. | 1 | The Natural Philosopher |
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