I've been wanting to start exploring the world of microcontrollers and programming for some time now, so I came up with this simple project which uses an app called "Blynk" to allow you to wirelessly control an Arduino board through your wifi. Now obviously the end result isn't the most practical device you'll ever build, but this was a great way for me to learn the fundamentals of programming Arduino and it can help you to learn too.

I've tried to arrange this project in an easy-to-follow format so it's ideal for someone who knows nothing about Arduino, but there's a lot of room for tweaking and improvement in my code that would allow more advanced users to get some use out of this project too.

This is a project that's been done before a few times, but I wanted to add something new by giving the system remote control functionality.

Step 1: Components Needed

This project can be completed for a very low price, I found a starter kit for Arduino that had everything you'll need for this project for £20/$25 excluding one servo.

  • Any Arduino board that can support 2 servos (I believe any Arduino board will work, just check it has 2 or more PWM pins)
  • 2 x Micro Servos (I used tower pros, I bought 30 for about £30)
  • A 3V-5V Laser Module
  • NPN Transistor
  • A few lengths of jumper wire, preferably in different colours to help you distinguish them
  • A smartphone
  • An enclosure - I used a yoghurt pot because at the right angle it's totally disguised


  • A very small breadboard would be useful for wiring if your laser is only going to be a temporary thing
  • A Wifi Shield would allow you to use the laser while it's not connected to a computer, but it would also require a battery
<p>Great project! I did it using a nodeMCU ESP-12 over wifi.</p>
<p>Great job, looks a lot more robust than mine!</p>
<p><a href="https://www.youtube.com/watch?v=GPm8n1r1P7g">https://www.youtube.com/watch?v=GPm8n1r1P7g</a></p>
<p>Neat project. I think it will be a fun winter project for me and my cat. Here's an idea that would speed up the movement and extend the life of the servos: Instead of mounting the laser on top of the servos, mount mirrors on each one. Then mount the laser in a stationary position and point at the movable mirrors.</p>
<p>Cheers, this is a really good idea! </p>
<p>This pail is a great toy for a cat.If it can save a measure of a zone, where animal be playing.Nice job!</p>
<p>LOL this could be fun to mess with the night stalkers, those who like to prowl in yards not their own.</p>
<p>One thing that I would suggest is that I would add some sugru around the end of the wires to stop the wires breaking continually.</p>
<p>I like it.</p><p>A death ray comes to mind at risk of upsetting the cat lovers out there, activated by the digging in the veg plot and settling the bottom in the about to poo position. Maybe just enough power to warm them up a bit.</p><p>Nice project though.</p>

About This Instructable




Bio: The name "Ikkalebob" was invented by my cat when she ran across the keyboard. I attempt all manner of projects, from home engineering to prop ... More »
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