I will not tell everything and why, we take a specific minus: the lack of a regime for the preparation of milk porridge. If you try to cook milk porridge, then it quickly runs away, after which the crock-pot turns into something terrible. This problem occurs because boiling milk needs a slightly lower temperature than water. What can you do here? Actually, I decided to “adjust” the sensors a little, thereby lowering the shutdown limit of the heating element.
In a nutshell about the operation of the device. The heating element heats the pan. Heats up until the microcontroller turns it off. And he will turn it off when the resistance at the sensors is below the threshold. In this model, there are two sensors: one in the middle of the heating element (it touches the pan) and the second is built into the top cover.
My idea is this: it is tedious to reduce the resistance of the sensor, thereby lowering the threshold for the shutdown threshold of the heating element. For this, I decided to introduce a switch mode with a resistor
It should be connected to one of the sensors, be careful: I work on different sensors in different modes. I chose the lower sensor, so it works in the "porridge" mode, more precisely, both sensors work in this mode. The resistance of the resistor was selected experimentally, it was 33 kOhm.
We drill a hole with scissors (the plastic is very soft) and insert the Soviet switch.
We turn off the control board and solder the wires of our circuit
Close, check. Be careful not to touch the wires.
Everything works, milk does not run away.
In conclusion, I will say that such a modernization can be implemented in any multicooker where there is no such regime.