Hello everyone!
Here’s how the project turned out:
Components used:
The programming was done in B4R.
			
			Here’s how the project turned out:
- 2 buttons to adjust the temperature limit;
 - 1 button to select the preset functions:
Fruits — 60 °C, Vegetables — 55 °C, Herbs — 40 °C, Meats — 55 °C to 75 °C; - Another button is used to turn the dehydrator lamp on and off.
 
Components used:
- ATmega328 microcontroller;
 - DS18B20 temperature sensor;
 - 2 5 V relays;
 - 4 red LEDs;
 - SSD1306 display;
 - 4 WS-type buttons;
 - 1 triac;
 - 1 MOC3021;
 - and other components.
 
The programming was done in B4R.