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Black Ice Warning System #piday #raspberrypi @Raspberry_Pi

via Black Ice Busters on instructables

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.

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