Our design is a sign that illuminates when icy road conditions are possible warning drivers to proceed with caution. We have created a metal sign that is white with a blue LED snowflake design. The snowflake has evenly spaced blue lights that light up when directed by the Raspberry Pi. All of the technology will be on the back of the sign. The wiring for the lights, the relay, battery pack, Raspberry Pi, and thermometer are also on the back. The sign works in a relatively simple way. The energy from the power source will travel to the Raspberry Pi system turning it on. The Raspberry Pi will use its programming to control the DHT11 sensor that will read the air temperature. Once the temperature is below 35 degrees Fahrenheit (or one degree Celsius), the Raspberry Pi will send a signal to the lights and turn them on causing the sign snowflake to light up with blue lights.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.