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I have this travel kettle which comes with 4 preset temps, none of which are exactly what I want.
On a scale from “an afternoon” to “likely impossible”, how hard do you think it would be to disassemble and modify one of the presets?
https://www.amazon.com/Electric-Portable-Temperature-Stainless-Protection/dp/B0C4NM9NVV
@Schneems disassembly: 15m to 2 hours. If it just uses screws that’s easy. Sometimes there are plastic bits that snap together when assembling. You need to know where and how to press/bend to un-snap. Easier if you done this a number of times before. Sometimes using a flat tipped screwdriver with a tiny blade is good for prying apart these snap joints.
If you get it apart share pictures. Likely the points are managed by a very simple mcu and might need reprogramming (hard).
@stepheneb thanks! I might wait until I know I don’t have travel and try so I can buy a new one if I break it.
If I can’t reprogram it. Maybe putting a tiny resistor in parallel to the thermocouple could let me have some adjustment?
Either way, getting it open and sharing pics is a good next step.
@Schneems if you haven’t done repairs like this before but think it might be fun it’s super useful to have 2 of the devices. I sometimes only properly know how to disassemble a device and fix something after I’ve broken it.
Finding out where and what type of sensor it uses for measuring temperature is a great first step. If you want all four temperature points warmer or colder modifying this circuit might work.
A simple mechanical example that might work to shift all temperature setpoints a bit up or down. Temp sensor is very likely attached to stainless container for water. There is likely an air gap between inner container and outer plastic shell.
Raise setpoints: Maximize heat transfer from container near sensor through outer shell.
Lower setpoints: Minimize heat transfer from container near sensor through outer shell.