The circuit presented here is a LED light stick which changes its color in respect with the room temperature. This is an Arduino compatible open source project consisting of 20 x WS2812B Addressable RGB LEDs, LM35 Temperature Sensor and ATmega328 microcontroller. Atmega328 microcontroller reads the LM35 temperature sensor and changes the RGB LEDs color as per sensor analog output. Multiple units of this board can be installed in the room to create full light color effects. Colors of this light will change as the atmosphere’s temperature changes. Placing the LED stick underneath a furniture or behind picture frames on the wall helps create a nice effect as well as improve the ambience of the room.
Temperature Controlled RGB LED Light Stick – Mood Light – [Link]