Arduino - Siren
In this tutorial, we are going to learn how to program Arduino to control a siren to produce a warning sound and/or light.
|1||×||Arduino UNO or Genuino UNO|
|1||×||USB 2.0 cable type A/B|
|1||×||12V Alarm Siren Horn|
|1||×||12V Power Adapter|
|1||×||DC Power Jack|
|1||×||(Optional) 9V Power Adapter for Arduino|
|1||×||(Optional) Screw Terminal Block Shield for Arduino Uno|
Or you can buy the following sensor kit:
|1||×||DIYables Sensor Kit 30 types, 69 units|
Depending on the manufacturer, a siren can produce either a loud sound or a warning light, making it suitable for an alarm system. It is also available in several operating voltages. This tutorial will use a 12V siren, and other voltages will be similar.
12V siren usually has two pins:
- Negative (-) pin (black): needs to be connected to GND of DC power supply
- Positive (+) pin (red): needs to be connected to 12V of DC power supply
How to Control a Siren
If 12V siren is powered by 12V power supply, it make sound and/or warning light. To control a 12V siren, we need to use a relay in between Arduino and 12V siren. Arduino can control the 12V siren via the relay. If you do not know about relay (pinout, how it works, how to program ...), learn about relay in the Arduino - Relay tutorial
This image is created using Fritzing. Click to enlarge image
The below code repeatedly turns the 12V siren ON in two seconds and OFF in four seconds,
- Connect Arduino to PC via USB cable
- Open Arduino IDE, select the right board and port
- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to Arduino
- Check out the siren's state
Read the line-by-line explanation in comment lines of code!
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