Make a Mini LED Siren powered by Arduino

This is one of the first projects I have made with Arduino. It’s a little siren with a LED that fades and blinks on and off. It demonstrates basic use of LEDs and speakers. Also check out this article: 8-Pin Programming Shield

Constructive criticism is appreciated!

Let’s get started!

Arduino Mini LED Siren


Step 2: Solder jumper wires to the button and speaker

Fire up your soldering iron and attach wires to each of leads on the button and the speaker. The picture shows mine when I was done.

Step 3: Drill a hole in the table tennis ball

Grab your dremel and drill a hole in the bottom of the ping pong ball. Make it large enough for the LED bulb to fit inside.

Step 4: Wiring it up

Get power to the breadboard:
Run a jumper wire from the Arduino GND pin to a breadboard “-” row.
Run a jumper wire from the Arduino 3.3v pin to a breadboard “+” row.

Wire the button:
Run one of the buttons wires to anywhere on the breadboard’s “+” row.
Run the other wire to an empty column on the breadboard.
Run a resistor from the button wire column to an empty column.
Run a wire from the resistor column to Arduino pin 7.

Wire the LED:
Stick the LED on to the breadboard. Slide each pin into a different column.
Run a wire from the positive LED column to Arduino pin 5.
Run a wire from the negative LED column to breadboard “-” row.

[box color=”#985D00″ bg=”#FFF8CB” font=”verdana” fontsize=”14 ” radius=”20 ” border=”#985D12″ float=”right” head=”Major Components in Project” headbg=”#FFEB70″ headcolor=”#985D00″]

Materials & Tools

Fist off, gather your materials and tools. I am assuming that you known the basics of Arduino and how to solder.

Arduino Uno
USB cable for the Arduino (sometimes called a printer cable)
solderless breadboard
breadboard jumper wires
LED (Any color)
-A small resistor or two.
small speaker (I found one for $2 at a thrift store)
Ping pong ball

soldering iron
electrical solder


About The Author

Scroll to Top
Read previous post:
New Sensor could sniff out Land Mines
New Sensor could sniff out Land Mines

A new type of sensor being developed by a team of researchers at the University of California, Berkeley based on...