I created a Laser piano using LDR and laser light diode. I used Arduino Leonardo Pro Micro connected to a speaker to generate sound. You can modify the tune of the piano by tweaking in the code and changing the frequency. I wanted to create something cool which can produce music and I ended up making this.
For this instructable you will need following components :
- Arduino Leonardo Pro Micro - 1
- 10 K resistor array - 1
- Laser diode - 8
- LDR - 8
- Speaker - 1
- Soldering Gun
- Nose Plier
- Wire Stripper
Step 1: Video
Step 2: First Step : Marking, Cutting and Gluing Base
The base is made up of lot of cardboard ad glue gun. I have given the details along with the dimension in the image. Also make sure you are choosing the right kind of cardboard for making it.
In this step, we are going to cutout cardboard with the given dimension. we are using good quality cardboard to avoid any lose structure. Also make sure that you are ready with your glue gun.
Step 3: Second Step : Inserting and Attaching LDR and Laser Diode in the Cardboard
Simply insert LDR on the top holes of the structure. Leave some legs of LDR. Because this will help us to bend it and align it so the laser diode is pointing light towards the LDR. Then solder one end of all the LDR together. And solder 8 wires to 8 legs of LDR. We will use them as inputs to arduino. Then Solder the common anode and common cathode of Laser diode.
Step 4: Third Step : Making the Circuit
Finally make the circuit as per the given circuit diagram. Note that I have used a 10K resistor array instead of normal 10K resistor. If you don't have a resistor array, you can use normal resistor.
Step 5: Coding
Our code is simple and uses 'delay' function to generate different sound. We are turning on speaker with frequency for certain time.
Github Link : https://github.com/vikkey321/Laser-Piano-DIY
I hope you like my tutorial on laser piano.
Subscribe to my YouTube channel for more tutorials like this.
My Social Profile Links: