Phone processors do post processing when taking a picture, even with the "no filter" selection. So yeah, it is understandable sometimes people can mistake a picture as "AI" since the artifact from said processing can become apparent
Where does it normally plug into? If it plugs into some sort of computing device, then yeah, one of them MAY be signal (probably LIN). If it could function with a simple switch however, then as the other said, try every combination possible.
Read about multiplexing. There are various ways to achieve it, the easiest way is to just arrange it on a grid. Let's say 5×5. So with 10 pins, you can address 25 doors. For the lock, the easiest would be a solenoid / magnetic lock. You can also use a motor, but that would require a more complex addressing to reverse the rotation for opening and closing
Edit for more clarity about the simple method:
Think of every door as a solenoid connected to GND. You only need VCC to open it. You can use relay module to switch the row and column to connect the VCC of the solenoid. But you need to wire every solenoid in "AND" switch configuration so it only turns on if and only if both row and column switch are closed
If your lithium battery has BMS, it should be fine since a lot of BMS will have a lot of protection including over current. If your raw dog the cell, then as the other said, any voltage and current into the battery should be capped. Ideally, you should monitor each cell as well to prevent an over voltage of any of the cells in the pack. If you want to be safe without monitoring every cell, then just make sure nothing gets back into the battery. Nothing goes in = can't get overcharged by accident from back emf.
There is a lot to unpack here. But my suggestion is "cheap" esp32 devboard. At least where I live, going with older / raw MCU (not a "devboard") will ended up more expensive. I'll give an example. The STM32F103C8T6 "Blue Pill" cost the same as ESP32 DOIT Devkit (around USD 3). BUT the bare MCU of both cost around 1-5 cent more due to the economy of scale. So unless you plan to design a custom board in bulk/size constraint, buying the devkit and making a daughter board can ended up cheaper
Yeah, that's a broken heater. A broken heater sign is usually high resistance or good ol disconnect. It being in parallel further reinforces that. This is a common schematic for domestic refrigerators.
I've seen the pic. So the plate is not the component? I thought the whole plate was the component. In that case, if it is a small metal plate like any of this, then it most likely is a thermal cutoff.
It's not running the compressor in reverse necessarily. It just used to sense when the temperature of some point has reached some threshold. Remember, a high temperature on the cold side could also be used to trigger the compressor to cool down the fridge.
It seems like I cannot find a picture of your component (if you ever posted any). If it is metallic looking, it is probably a thermal cutoff of some sort. The wikipedia article focuses on the fuse-looking one, but there also exists a flat metal plate looking one. The connection is usually normally open so if the temperature on the loop is ever too high, the motor (compressor) will trigger. The normally closed connection one is for motor overheat protection. That kind is usually placed/glued to thbe e stator body, so if it ever gets too hot, it will stop the motor instead.
Edit:
The picture provides a clearer size of the metal plate. A plate of that size is not a thermal cutoff. I don't know what it is either. But if it is indeed a heater, you should be able to measure the resistance. If it is a resistive heater, usually it will have a low resistance (usually <10R). And metal is not "cold" at room temps, they are the temperature of room temps. It just feels cold because of higher thermal conductivity
Well, because Arch tries to be simple and pragmatic. The way the official repo is organized speaks volumes about its philosophy.
Just read their FAQsMy bad, not FAQs, but their explanation page