It looks like 440 grade stainless and is non-magnetic. It tried with a very strong Neodymium magnet. Also most mash tuns i’ve seen are either made from a cooler, copper or stainless pot and stirred with a motor in the lid, if they are stirred at all, usually just the sparging arm rotates. I don't think I’ve ever seen one with a magnetic stirrer not even sure how that would work through the grains.
It was a used Keezer I picked up from Craig's list, I took my time disassembling, cleaning, and reassembling / rewiring so now the seller is no longer contactable to ask.
These are solid, not a tube.
The handles are threaded and these are not.
The groove defiantly looks like a detent, the kegs do have a lever that lifts to open them but there is no hole for this to fit.
To big for a beetle, maybe Crazy Frog’s handle bar?
Nope, solid. The angle is about 25° and is the same on both sides. I have four of them all identical. The Keezer is a 4 keg system but nothing I can find shows these as a part for the kegs, regulators, beer faucets, etc.
Made of 440 grade stainless, was included with parts for a keezer so may be related to beer brewing, 1/4 in dia.
That just looks like discoloration that sheet metal gets with repeated heating. I would investigate the controls, there are contacts that open/close as a bimetallic strip heats up and cools off (basic thermostat). if the contact are arcing or stuck it could over heat, also since you said smoke was coming from the knob. . .
If you have some electronic skill you can use espHome on a esp32 microcontroller to control an RC Servo motor.
https://esphome.io/components/servo.html
If you want out-of-box there are several electronic locks that will work.
https://community.home-assistant.io/t/smart-locks-compatible-with-home-assistant/590662
https://www.nytimes.com/games/connections
Connections
Puzzle #462
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I have a project that is using a Teensy 4.1, the cheep 5v regulator I was using in the project let the magic smoke out for no good reason. I replaced that but now the Teensy boots and runs for about a min then quits. There is a TLV75733P power IC that is supplying the 3v3 and it gets hot then quits supplying power. Since that IC is $0.46 vs a new Teensy 4.1 ~ $40 I want to try and replace it. I have done a bit of SMD work but not tried to remove a tiny chip with a GND pad before so I’m looking for any tips. The PCB of the Teensy has header pins so I can’t really get good contact to a hot plate to preheat the board.
