Room Occupancy Counter Kit with Arduino Uno + LED
Build a Live Room Occupancy Counter with Arduino Uno — Smart Home Starter Kit
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine a door frame that knows exactly how many people are inside a room. This kit lets young makers build that very system using two invisible IR beams. When someone walks through the door, the Arduino reads which beam breaks first to determine direction, then updates a live count on the OLED screen. It is a real glimpse into how smart buildings monitor space usage, automate lighting, and manage energy.
What You'll Build
You will assemble a working bidirectional people counter that mounts beside any doorway. The two IR emitter-detector pairs create a sensing corridor, and the Arduino Uno processes the beam-break sequence to increment or decrement the count. A crisp 0.96-inch OLED shows the current number of occupants in the room instantly.
What You'll Learn
- How to wire and calibrate IR LED and photodiode pairs for beam-break detection
- Programming directional logic on Arduino Uno to distinguish entering from exiting
- Driving a 0.96-inch OLED display over I2C and rendering live count data
- Using the LM393 comparator to convert analogue photodiode signals into clean digital inputs
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| IR LED 940nm | 2 |
| IR Photodiode | 2 |
| LM393 Comparator | 1 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 5 |
| 220Ω Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 9V Battery Snap | 1 |
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
This kit meets CBSE Class 11-12 physics and computer science project requirements with a practical smart home demonstration. ATL Tinkering Lab students can use it to explore sensor integration and automation concepts. It is also a strong choice for B.Tech ECE first-year mini projects at VIT, BITS, or NIT campuses looking for a functional sensor-fusion prototype.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — 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 to open your AI build companion trained on this exact kit. If you need a human touch, drop us a message on WhatsApp and we will guide you through the sensor alignment or code logic.
Can this counter differentiate between one person and a group walking together?
With two beams spaced closely, the system works best for single-file entry. For wider doorways, you can later expand the concept using additional sensor pairs, which the learning material explains.
Will ambient light or sunlight affect the IR sensors?
The LM393 comparator and the 940nm IR sensors are designed to filter out much of the ambient noise. The build guide also covers optimal mounting angles and threshold tuning for Indian indoor lighting conditions.
Does this kit need soldering?
No soldering required. All connections are made on the included 400-point breadboard using the provided male-to-male jumper wires.
Two IR beams at door count people entering and leaving. OLED shows live occupancy count.
What's in this kit
- Arduino Uno R3
- IR LED 940nm x2
- IR Photodiode x2
- LM393 Comparator
- 0.96in OLED
- 10kΩ Resistors x5
- 220Ω Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 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