Ultrasonic Tape Measure Kit with Arduino Uno + Ultrasonic
Build a Digital Ultrasonic Tape Measure with Arduino Uno + OLED Display
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Ditch the flimsy plastic ruler and build a precise electronic distance meter that fits in your palm. This kit turns an Arduino Uno and an HC-SR04 ultrasonic sensor into a real‑world measuring tool that reads out instantly on an OLED screen—switch between centimetres, inches, and feet with a tweak in the code, then freeze any reading with a single button press. Perfect for mapping a room, sizing up furniture, or tackling a DIY home project without bending, stretching, or squinting.
What You'll Build
A compact, battery‑powered instrument that pings sound waves off a target and converts travel time into distance. The 0.96‑inch OLED shows the value clearly in your chosen unit, and the tactile freeze button latches the number so you can retrieve it even after you’ve moved away. You’ll end up with a device that teaches sensor physics, coding logic, and unit conversion while delivering a genuinely useful gadget for daily measurements.
What You'll Learn
- Interface an HC-SR04 ultrasonic sensor to read pulse timing and compute distance.
- Drive a 0.96‑inch OLED display using I2C communication and Arduino libraries.
- Convert microseconds into centimetres, inches, and feet programmatically.
- Debounce a tactile push button to reliably freeze and hold a live reading.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| HC-SR04 | 1 |
| 0.96in OLED | 1 |
| Tactile Button | 1 |
| 10kΩ Resistors | 5 |
| 4.7kΩ 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
Designed for young makers aged 5–15 (parental help is useful for the youngest), this project fits naturally into CBSE Class 9–12 physics practicals, ATL Tinkering Lab sessions, and STEM hobbyist benches. If you’re a B.Tech ECE student looking for a quick weekend build, or a parent hunting for a hands‑on activity that beats screen time, this kit delivers clear, working code and all the hardware in one box.
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 inside the box to chat with the AI companion trained on this kit. For trickier issues, drop us a message on WhatsApp—we’ll walk you through it.
Does the display update continuously, or only when I press the freeze button?
The OLED shows live distance readings in real time. Pressing the freeze button simply holds the last measurement on screen so you can read it without the sensor needing to stay in place.
How accurate is the HC-SR04 sensor for everyday measurements?
You can expect ±2 mm precision indoors up to about 4 metres. Glossy or soft surfaces (like curtains) may reduce the maximum range, but the sensor works excellently on walls, wood, and people.
Can I change the code to display metres instead of inches?
Absolutely. The Arduino sketch is fully open, and the conversion formulas are clearly commented. Swapping in metres or yards takes just a small arithmetic tweak—a great way to practise unit handling.
HC-SR04 measures distance. OLED shows cm, inches and feet. Freeze button stores last reading.
What's in this kit
- Arduino Uno R3
- HC-SR04
- 0.96in OLED
- Tactile Button
- 10kΩ Resistors x5
- 4.7kΩ Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
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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