I don’t understand this concept outside the use of an open-topped carafe as seen in the video.

In a proper ‘thermos’ unit, if you were to do anything that compromised either the seal of the screw-top lid or the internal bottle, you’d pretty much destroy the ability of the thermos to keep things warm.

On reading the title I thought there might have been some novel wireless solution (coping with the fact that the internal module would be surrounded on nearly all sides with two layers of steel)

Why use a battery? Switch to a peltier module and have it power itself.

You have to connect it to the computer or an external power supply? you suck…

yey arduino is a fish tank sticker

The best way I can think to do this would be a non-contact IR thermometer installed in the lid of the thermos, or maybe pointing at the bottom of the bottle through a pair of un-silvered spots in the glass.

Otherwise an RFID-style chip could be embedded inside the thermos and powered through induction when being read.

Similar, but not quite as complicated as an idea I had (but sadly don’t have the knowledge to make a reality).

Add temperature sensing capability to an insulated container. Run info to a settable controller. Run back out to peltier or similar to adjust temp. This would be run off of a medium sized battery (LiPo R/C battery?). Set desired temp and the circuit would maintain it until the battery was dead.

I have been dreaming of a solution like this for the cross country shipping of live coral specimens. I would think with a properly designed (read: efficient) circuit, a good battery and a well insulated package you could easily get a few days out of it keeping the specimen at 78 degrees. Anyone want to provide technical advice? :-)

That aint no thermos. Cheap chineese thermoses cant keep nothing cool.

Embed the temperature meter in the cap and have a plastic probe that sticks down into the thermos. Dump the arduino in favor of an ATtiny and LCD display with a supercap to hold a charge. Put solar cells on the cap. The ATtiny can double as a charge controller too.

Not a hack. It’s an experiment. plus the link has zero information.

Honestly, it should not be listed here unless it has details on what was done.

I used the cable and not the battery to be able to read analog, but the arduino has a 9V battery just change the jumper.