Most cars nowadays are made with automatic headlights and a whole load of fancy features that make your driving experience safer and easier. What if you wanted to add some of these features to your older car at a very low cost? Well, we have created a system that both alerts you when temperatures have dropped below freezing and automatically turns on your headlights when the sun goes down. The Particle Argons used are programmed to read sensor data and alert the driver when lighting and temperature conditions may be unsafe. The driver is alerted via a text message as well as a blinking light when poor conditions are present. The LED in the light sensing circuit represents a car's headlights and will automatically turn on when low light levels are present. These responses to potential road hazards are important for keeping people safe on the road and serve as a friendly reminder to drivers of road conditions. This project is a first in allowing for outdated cars to have the driving protection factors that newer cars have. By learning the applications of different sensors, and how to properly utilize them in a design, a solution to car safety was formed.
Light Sensing Circuit
The light sensing circuit uses a 5MΩ LDR to create a change in resistance when low light levels are detected. The Argon turns an LED light on when it gets dark enough. This LED light signifies the car's headlights turning on.
The LDR is covered with a sheet of paper causing the LED to turn on.
The temperature circuit uses an LM35 temperature sensor which changes the voltage output when exposed to different temperatures.
The Argons must communicate with each other. The Argon from the light-sensing circuit was programmed to turn on the D7 LED (red circle) on the temperature Argon.
Temperature data was collected for one minute. When developing our project we noticed the LM35 temperature sensor was outputting inconsistent values. We think the sensor is faulty due to the inconsistent outputs.