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I feel cheated! I wanted a 3D printer that prints gingerbread!! :-)
I was just heading to the patent office when I came across this :-( https://www.theatlantic.com/technology/archive/2014/01/what-3d-printed-cake-tastes-like/282904/
Excellent project, but using a Raspberry Pi seems like overkill. Have you looked at Arduino devices? Some ESP8266 devices have ADC capabilities, as well as wifi/Internet connectivity. https://www.instructables.com/id/ESP8266-ADC-Analog-Sensors/
There should be next to no current flowing, so the wattage of the resistor should be essentially irrelevant.
Unfortunately, using celery to produce the pink colour, also produces the same nitrates :-/
I raised the issue of botulism particularly because this recipe doesn't use sodium nitrite and the vacuum sealing would create similar conditions to "improper home canning". The other ingredients may stop botulism developing but it's a hell of a risk to take.While cleanliness is important in food production, botulism spores are in the air around us and can come in contact with food, no matter how clean you keep things.
I'd be very wary about using a vacuum sealer, as that could create the conditions for botulism.
I made a standing desk using shelving, it's similar to the one in the attached photo, although I used much larger brackets for the main desk.
Great idea.How about feeding some rope through the conduit so that the roof bars can be tied to the vehicle?You might also be able to use plastic tube, if the load isn't very heavy.
Zinc carbon batteries are still readily available. They're usually the cheapest batteries you can find and are often labelled heavy duty.
I'd never heard of a storm glass before (thanks for that) but it does remind me of a weather stone :-)