----------------------------------------------------------------------------------
@MSGID: 3:633/10 f6054d73
@REPLY: 3:633/10 307b8615
@PID: PyGate 1.5.16
@TID: PyGate/Linux 1.5.16
@NOTE: tin/1.8.3-20070201 ("Scotasay") (UNIX)
(Linux/5.10.0-44-amd64 (x86_64))
@CHRS: ASCII 1
@TZUTC: 0100
@REPLYADDR: theom+news@chiark.greenend.org.uk
@REPLYTO: 3:633/10 UUCP
@RFC-Message-ID:
<97F*GybJA@news.chiark.greenend.org.uk>
The Natural Philosopher <
tnp@invalid.invalid> wrote:
> On 15/06/2026 19:49, Brian Gregory wrote:
> > On 14/06/2026 12:17, The Natural Philosopher wrote:
> >> The process of debugging my remote oil level sensor continues. This is
> >> based on a PICO W plus a nano timer to wake it up every couple of
> >> hours to send a message via the home wifi.
> > nano timer ??
> >
> > What`s that then?
>
> TPL5100
>
>
https://www.ti.com/product/TPL5110
It`s disappointing that it`s not available in a higher voltage version
since, as you say, it needs to be directly connected to the battery.
I suppose one workaround would be to use a single lithium ion cell to give
you down to 3V and then a boost converter which you only run when the
CPU is operating. Timer goes off, boost converter spins up to power your
CPU at a stable 5V (or whatever), then CPU tells it shut off again once
done.
That`s likely going to take more power than just running directly off
battery, but the flipside is you can install several 18650 cells in parallel
if you want to get more capacity.
The primary lithium AAs aren`t a terrible option though, especially if you
are more likely to be killed by self-discharge of the battery than by your
own load.
Theo
--- PyGate Linux v1.5.16
* Origin: Dragon`s Lair, PyGate NNTP<>Fido Gate (3:633/10)
SEEN-BY: 19/10 50/109 135/250 153/757 218/840 840
220/70 221/1 6 360 226/17
SEEN-BY: 226/100 229/426 240/1120 267/800 301/1 113
812 310/31 335/364 341/66
SEEN-BY: 463/68 633/10 280 414 416 418 420 422
509 2744 712/848 770/1 3 100
SEEN-BY: 770/340 350 772/210 220 230 5019/40
5020/715 848 1042 4441 12000
SEEN-BY: 5030/49 722 1081 1474 5053/55 5061/133
5075/128
@PATH: 633/10 280 770/1 218/840 221/6 301/1
5020/1042 4441