Circuit Scribe Light Theremin

Introduction: Circuit Scribe Light Theremin

This Instructable uses Circuit Scribe modules and conductive ink to create a simple light theremin. In this project, the input from the light sensor determines the pitch of the sound generated by the buzzer. The Circuit Scribe kit makes this easy to do - no programming required.

Materials Needed:

Circuit Scribe buzzer

Circuit Scribe light sensor

Circuit Scribe power module + 9V battery

Steel sheet


Conductive ink

Circuit Scribe footprint template

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Step 1: Step 1: Plan Your Circuit; Draw Footprints

Take a look at your components - for this project, we're using a buzzer, a light sensor, and a power module - and consider how you will connect them to each other. You may want to do a pencil sketch before using conductive ink to create your final layout.

Use the circuit stencil provided in the Circuit Scribe kit to easily mark accurate footprints for each component. Be sure to fill the circle in to ensure a robust connection.

Step 2: Step 2: Make Connections

Connect components to each other. I found it helpful to label footprints to ensure I was connecting the right pieces. Here, we connect the positive side of the power module to 'VCC' on the photo sensor, then 'output' on the photo sensor to the positive side of the buzzer. The negative side of the buzzer connects to 'GND' on the photo sensor and ultimately to the negative side of the power module, completing the circuit.

Be sure to make your connections robust, and be careful to keep them apart from each other. Electricity will take the easiest route, and we don't want a short circuit!

Step 3: Step 3: Place Elements, Test Circuit

Now, for the moment of truth. Place the modules atop their footprints, turn on the power, and experiment with light. You may need a flashlight (I used a cell phone light) to trigger the sound.

Is your circuit working? If not, it's time to troubleshoot! Are your connections solid? Do you have a short circuit anywhere? Are all of your modules in the right places?

Step 4: Step 4: Make Beautiful Music!

You did it! Have fun playing your light theremin!

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    4 Discussions

    Dr Froggy
    Dr Froggy

    5 years ago on Introduction

    Hi there,

    I like everything except the fact you do not explain shortly - at least - what is the purpose of a light theremin... or any background why you are doing that.


    I would so much more appreciate your instructables with a background.

    I will so much like to know why this feature instead of another set up...

    Especially because I am interested in learning more about electronics using such learning/application tools like circuit scribes or another stuff from another company I read about on instructables too.

    "As a metaphoric image: Do not limit yourself explaining how to sharp my pencil, but why you come up with that idea and what you can draw with it..."

    But keep structures so that people find the information where those need to be as you did with the instructables so far. :-)

    I hope this will help you improve this instructables to become more story telling. ;)


    Reply 5 years ago on Introduction

    Thanks for your helpful suggestions! Edited to add a short description of what a light theremin does.

    Dr Froggy
    Dr Froggy

    Reply 5 years ago on Introduction

    Thank you for editing this instructables! Now I understand what is this system for! thumb up!

    So tell me why you went for that light theremin and not another set up. You were looking for system to build with circuit scribes? or you have a bigger idea where the light theremin may have a place.

    How you came up with this idea :D

    (I say that because I did that already! I had a bigger picture but I can share my ideas at early stages)


    Reply 5 years ago on Introduction

    Our program received a Circuit Scribe kit through Instructables' Build Night program, and this instructable came out of our experience using the kit. The light theremin is always a fun project because of the noise and interaction.