Lesson 9 Flame AlarmΒΆ
Introduction
A flame sensor module performs detection by capturing infrared wavelengths from flame. It can be used to detect and warn of flames.
Components
1 * SunFounder Uno board
1 * USB data cable
1 * Flame sensor module
1 * Passive buzzer module
1 * 4-Pin anti-reverse cable
1 * 3-Pin anti-reverse cable
Principle
There are several types of flame sensors. In this experiment, we will use a far-infrared flame sensor. It can detect infrared light with a wavelength ranging from 700nm to 1000nm. A far-infrared flame probe converts the strength changes of the external infrared light into current changes. And then it converts analog quantities into digital ones.
In this experiment, connect pin D0 to the digital port 8 of the SunFounder board. Then when the flame sensor detects flame signals, the buzzer beeps and the corresponding LED lights up. When it detects no flame signals, the buzzer stops and the LED goes out.
The schematic diagram of the module:
Experimental Procedures
Step 1: Build the circuit
The wiring between the flame sensor and SunFounder Uno board:
Flame Sensor |
SunFounder Uno |
D0 |
8 |
A0 |
A0 |
VCC |
5V |
GND |
GND |
The wiring between the passive buzzer and SunFounder Uno board:
Passive Buzzer |
SunFounder Uno |
SIG |
7 |
VCC |
5V |
GND |
GND |
Step 2: Open the code file
Step 3: Select correct Board and Port
Step 4: Upload the sketch to the SunFounder Uno board
Code
Now, ignite a lighter near the flame sensor. Then the buzzer will beep, and the LED on the flame sensor module and that attached to pin 13 of the SunFounder board will light up.