LDR Light Theremin Kit with Arduino Uno + LDR
Hands-On LDR Light Theremin Kit with Arduino Uno β Build a Light-Controlled Synthesizer
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Transform light into music! This Arduino-powered theremin lets you control pitch by simply covering or uncovering the light-dependent resistors (LDRs). Perfect for young makers exploring how sensors translate real-world changes into sound. No soldering β just plug components into the breadboard and upload the code.
What You'll Build
You'll assemble a working light theremin that responds to hand gestures over two LDR sensors. One sensor controls pitch, the other can be used for volume or effects as you expand. The passive buzzer creates clear tones that change instantly as ambient light shifts β wave your hand to play melodies, or use a torch to trigger sounds from across the room.
What You'll Learn
- How an LDR (Light Dependent Resistor) changes resistance with light intensity
- Reading analog sensor values with Arduinoβs analog-to-digital converter
- Mapping sensor input to audio frequency using the tone() function
- Circuit building on a breadboard β connecting LDRs, resistors, and buzzer without soldering
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | x1 |
| LDR | x2 |
| Passive Buzzer | x1 |
| 10kΞ© Resistors | x5 |
| 400-pt Breadboard | x1 |
| M-M Wires | x15 |
| 9V Battery Snap | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Ideal for CBSE Class 5β10 students exploring sensor-based electronics, ATL Tinkering Lab projects, and beginner Arduino enthusiasts. Parents and teachers can run a complete STEM workshop in 2β3 hours with clear, age-appropriate instructions. B.Tech first-years and hobbyists from IITs, NITs, and VIT will also use it to quickly prototype light-to-sound interfaces.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project β accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code inside the box to chat with the AI companion, or drop a WhatsApp message. It knows this kitβs wiring and code in detail.
Does this kit need any soldering?
No soldering at all. All connections use the included breadboard and male-to-male jumper wires β just press components in.
Can I use this kit with a 9V battery for outdoor play?
Yes, the included 9V battery snap powers the Arduino Uno directly, making it portable. Perfect for science exhibitions or outdoor sound experiments.
What sounds can I make beyond a simple tone?
Once you master basic pitch control, you can program the Arduino to play melodies, change waveform, or even trigger samples. The AI companion includes extension ideas and ready-to-upload code snippets.
LDR maps ambient light level to tone frequency. Cover and uncover sensor to change pitch. Visual + audio.
What's in this kit
- Arduino Uno R3
- LDR x2
- Passive Buzzer
- 10kΞ© Resistors x5
- 400-pt Breadboard
- M-M Wires x15
- 9V Battery Snap
Do you deliver across India?
Yes. We ship LDR Light Theremin Kit with Arduino Uno + LDR across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.
What payment options are available for LDR Light Theremin Kit with Arduino Uno + LDR?
We accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.
Built and shipped from Compoden, with COD and UPI available across India.
Other projects you can build
Shipping Information
- Prepaid Orders: βΉ75 for orders up to βΉ999, FREE shipping above βΉ999
- COD Orders: βΉ125 shipping + βΉ50 COD fee = βΉ175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items