DEVELOPMENT OF A PROTOTYPE OF "SMART" CLOTHING WITH REMOTE CONTROL AND TEMPERATURE CONTROL BY MEANS OF MICROELECTRONIC DESIGN

Abstract

Background. The most common cause of human disease is hypothermia of the body. This problem can be solved by using «smart» clothes with the ability to control temperature and adapt to the surrounding external conditions. The purpose of this work is to develop a prototype of «smart» clothing with remote control and temperature control. Materials and methods. When developing the device, preferences in the element base are given to the ESP-32 microcontroller with built-in transmission modules (Wi-Fi, Bluetooth). ESP-32 has the necessary characteristics: operating temperature, built-in thermal sensor, the ability to use the 1-Wire interface, support for Bluetooth Low Energy (BLE) protocol. To accurately determine the temperature outside the controller, sensors with high accuracy and a wide measurement range (±1 °C, from –55 °C to +125 °C), as well as the small dimensions of the DS18b20 case are selected. The LM317 stabilizer is used as a voltage stabilizer for the controller and sensors. All components are used in chip design to minimize the size of the device. Results and conclusions. Based on the results of the microelectronic design of the device, the sensors necessary for the minimum functionality were determined and an algorithm for the operation of the product was developed. The device has a small size (75 × 48 × 22 mm), powered by a powerbank with an output voltage of 5 volts and a current of at least 2.1 amperes, zonal heating temperature up to 40 °C. The operating time of the product with the heaters turned on is 8–10 hours, due to the control of PWM power keys, the time can be increased by reducing the degree of heating.

Keywords

• microelectronics
• temperature control
• information processing
• textile industry