This project is the installation of the temperature controller circuit. In daily production and life, temperature control is very important and common, and has been widely applied in household life, environmental monitoring, food storage, vegetable greenhouses, and reliable equipment operation. A simple temperature controller consists of a temperature sensor and a comparison amplifier, which converts the temperature variable into a level variable to achieve control of the subsequent circuit. Item name:Temperature Controller Circuit Kit Board size:81x40mm Power supply:DC 6V Note:It's diy kits. Need to solder by yourself. Colour:Dark Green Material:Plastic Package Contents: 1 * Temperature Controller Circuit Board Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.