Re: Pi PICO W on batteries

Liste des GroupesRevenir à cs raspberry-pi 
Sujet : Re: Pi PICO W on batteries
De : jrwalliker (at) *nospam* gmail.com (John R Walliker)
Groupes : comp.sys.raspberry-pi
Date : 25. Jun 2026, 09:21:22
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <111ioe2$3iarj$1@dont-email.me>
References : 1 2 3 4 5 6 7 8
User-Agent : Mozilla Thunderbird
On 25/06/2026 04:35, wmartin wrote:
On 6/24/26 08:41, The Natural Philosopher wrote:
On 24/06/2026 15:51, Peter Heitzer wrote:
Theo <theom+news@chiark.greenend.org.uk> wrote:
Anssi Saari <anssi.saari@usenet.mail.kapsi.fi> wrote:
The Natural Philosopher <tnp@invalid.invalid> writes:
>
On 15/06/2026 19:49, Brian Gregory wrote:
nano timer ??
What's that then?
>
TPL5100
>
https://www.ti.com/product/TPL5110
>
I kinda thought modern microcontrollers have this sort of thing built
in? Oh, looks like the Pico (no W) draws 2 mA in "deep sleep" and this
timer draws 35 nA.
>
That does sound surprisingly bad for the Pico.  Seems that the RP2040 is
0.18mA in 'dormant' (ie deep sleep) and 0.38mA in 'sleep', which is a bit
better.  So must be something else on the Pico that's not so good in sleep
mode.
I think (ultra) low power was not a primary design goal for the Pico.
>
>
I think that is very true. What attracted me was the amount of flash, and ram, the availability of wireless and ADCs and the price. Less than a pint of beer in a nightclub.
Arduinos were 3 times the price
>
The ZeroW running debian is a damn sight easier to code for, however.
>
Be careful about trusting that ADC, it is somewhat notorious for inconsistent lower bits...summing and averaging helps, if you have the inter-sample time to do that.
 
The errors are very predictable as they are caused by certain
very low value capacitors in the switched capacitor adc having
incorrect values.  It seems that the chip design tools did not
model stray or fringing capacitances accurately enough.
There is software around that can post process the adc readings
to make a substantial improvement.
https://github.com/kitanokitsune/rp2040adc_correction
John

Date Sujet#  Auteur
14 Jun 26 * Pi PICO W on batteries23The Natural Philosopher
14 Jun 26 +* Re: Pi PICO W on batteries9rbowman
15 Jun 26 i+* Re: Pi PICO W on batteries7The Natural Philosopher
15 Jun 26 ii+* Re: Pi PICO W on batteries2John R Walliker
15 Jun 26 iii`- Re: Pi PICO W on batteries1The Natural Philosopher
15 Jun 26 ii`* Re: Pi PICO W on batteries4Peter Heitzer
15 Jun 26 ii `* Re: Pi PICO W on batteries3The Natural Philosopher
15 Jun 26 ii  `* Re: Pi PICO W on batteries2Peter Heitzer
15 Jun 26 ii   `- Re: Pi PICO W on batteries1The Natural Philosopher
15 Jun 26 i`- Re: Pi PICO W on batteries1mm0fmf
15 Jun 26 `* Re: Pi PICO W on batteries13Brian Gregory
15 Jun 26  `* Re: Pi PICO W on batteries12The Natural Philosopher
15 Jun 26   +* Re: Pi PICO W on batteries2Theo
16 Jun 26   i`- Re: Pi PICO W on batteries1The Natural Philosopher
24 Jun07:33   `* Re: Pi PICO W on batteries9Anssi Saari
24 Jun09:58    +- Re: Pi PICO W on batteries1The Natural Philosopher
24 Jun13:41    `* Re: Pi PICO W on batteries7Theo
24 Jun13:53     +- Re: Pi PICO W on batteries1The Natural Philosopher
24 Jun15:51     `* Re: Pi PICO W on batteries5Peter Heitzer
24 Jun16:41      `* Re: Pi PICO W on batteries4The Natural Philosopher
25 Jun04:35       `* Re: Pi PICO W on batteries3wmartin
25 Jun09:21        +- Re: Pi PICO W on batteries1John R Walliker
25 Jun10:12        `- Re: Pi PICO W on batteries1The Natural Philosopher

Haut de la page

Les messages affichés proviennent d'usenet.

NewsPortal