Building a Circuit w/ Flame Sensor, Relay, and Fan

Hello everybody,

During the past week, I put together a circuit that can detect and put out a small flame, using components given within our Arduino kits. I used an infrared sensor to detect the flame, a fan to extinguish the flame, and a relay to connect the fan to the Arduino system without damaging any of the components. The images below are the sensor, the relay, and the fan respectively.

Function:

When connected to a source of power, the infrared sensor will detect infrared light and transmit that data back to the Arduino. Once that reading has exceeded a certain level, i.e. a flame is introduced within a short range, the Arduino will send a signal to the relay that will allow the fan to trigger for as long as the sensor detects a flame. Once the fan has blown out the flame, the sensor will no longer detect high levels of infrared light, and will the signal provided to the relay by the Arduino will cease, stopping the fan.

Video Demonstration: