I found this blog about some hacks to run an arduino pro mini with AA batteries (I have the 8mhz/3.3v). But since I'm using a NRF24 radio, I'm worried that screwing up with the frequency (and removing the voltage regulator) will not work too well. I'm not able to power a simple pro mini + temperatur…

You seem to be operating on a fair bit of misinformation, and should do some more reading. Cross checks are usually required, as there are a lot of really awful tutorials, like Instructables. The one I linked in reply #9 has lots of useful and technically correct ideas. The DS18B20 draws about 1 mA…

Arduino Pro Mini with AA batteries

Projects General Guidance

anon57585045 August 30, 2021, 1:31pm 4

Perhaps you didn't manage to power down the temp sensor during sleep? Just a guess?

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Arduino Pro Mini with AA batteries

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