Shoe dryer

[anso-engineer]

Hello, I am considering to work on small project which relates to shoe drier. The same devices which can be taken there is poor quality and there is not intellegent level as I want. So I am driven by idea of creation it.
Mainly it have to be designed for the small shoes size (not tall woman or child feet), could you suggest which heaters I need for this and with which amound of designed power?
And yes, temp sensors and need there. The most of signals will be processed through the STM32 bluepill.

 

[Tony Stewart]

Minimum power 10W + Fan (3W) either central or per shoe.
Some have UV LED for to kill bacteria
Needs OTP , fan fail detect.
Market is flooded already.

 

[ahsrabrifat]

As you are working on intelligent controll, you can use DS18B20. It is Accurate, digital, and easy to interface with STM32.

Simple digital thermometer 7Segmentic on STM8 & DS18B20 - Share Project - PCBWay

A simple digital thermometer made on an 8-bit microcontroller STM8S103F3P6 and a DS18B20 digital temperature sensor.The night mode is implemented in this thermometer. The device uses a photoresistor a...

www.pcbway.com

 

[danadak]

The CPU has an onchip T sensor -

Regards, Dana.

 

[ZipZapOuch]

The CPU has an onchip T sensor -

View attachment 148921

Regards, Dana.

This temperature sensor is, of course, measuring the MCU's core temp and intended as a check to keep the core in a safe operating range. Your mileage may vary when using it as an environmental temperature sensor as it has a slow time-constant and, obviously, heavily influenced by processing load.

 

[danadak]

This temperature sensor is, of course, measuring the MCU's core temp and intended as a check to keep the core in a safe operating range. Your mileage may vary when using it as an environmental temperature sensor as it has a slow time-constant and, obviously, heavily influenced by processing load.

Yes typically if one is driving costs one can consider halting processes, and due to
thermal mass use classic rate of change to get a final value T with a lot less delay.

Not sure how below (DS18B20) compares to using onchip sensor, would have to be looked at :

And being a shoe heater, relative to latency, how critical is that as issue, for either approach.....