Bluetooth Smart Door Lock Kit with Arduino Uno + Servos
Design a Bluetooth-Enabled Smart Door Lock with Arduino Uno & Servo Precision
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 unlocking your room door with a tap on your smartphone—no keys, no keypad, just a custom-built smart lock that you assembled and programmed. This kit takes you deep into the mechanics of a real-world IoT application: a motor-driven crank-rocker converts continuous rotation into the exact oscillating motion needed to throw a deadbolt, while a precision servo adjusts the striker pitch for a seamless, secure fit every time.
What You'll Build
You will construct a fully functional Bluetooth door lock prototype that bolts onto a wooden or metal test frame. The assembled mechanism uses a 12V DC motor and custom linkage to slide the bolt, and the servo fine-tunes engagement angle based on feedback from the Arduino. Your phone connects via the HC-05 module so you can send lock/unlock commands from a custom app or serial terminal.
What You'll Learn
- Program an Arduino Uno to parse Bluetooth commands and actuate motor + servo outputs in tandem
- Design and build a crank-rocker four-bar linkage that translates motor rotation into linear bolt movement
- Implement power regulation using the LM2596 buck converter and protect circuits with diodes and capacitors
- Solder components onto PCB prototype boards confidently—soldering iron and wire are included
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DC Motor 12V | 1 |
| L298N Driver | 1 |
| SG90 Servo | 1 |
| LM2596 Buck Converter | 1 |
| HC-05 Bluetooth | 1 |
| 1N4007 Diode | 5 |
| 100nF Caps | 5 |
| 7.4V LiPo 1300mAh | 1 |
| PCB Prototype Board | 2 |
| Soldering Iron | 1 |
| Solder Wire | 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
Tailored for B.Tech ECE/EEE final-year project students from IIT, NIT, VIT, or BITS who need a demonstrable hardware prototype. Also ideal for Smart India Hackathon participants tackling smart security challenges or ATL Tinkering Lab mentors guiding advanced students. If you enjoy the intersection of mechanical engineering and embedded systems, this build will stretch your skills.
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 on the box to activate your AI companion, which knows every step of this lock assembly. You can also reach out on WhatsApp for direct engineer support within hours.
Can I present this as my major project in college?
Absolutely. The kit includes full documentation of the mechanical linkage and code comments that satisfy most university evaluation rubrics. Many students have successfully submitted similar Compoden builds.
Does the lock work on a real door?
The included motor and linkage are sized for a prototype test rig, not a heavy external door. You can mount it on a plywood mock-up to demonstrate the lock/unlock action and servo alignment precisely.
Do I need any extra tools or software?
The kit includes a soldering iron and solder wire. You'll need a laptop to program the Arduino (Arduino IDE is free) and a smartphone to install a Bluetooth terminal app—both are readily available and not included.
Smart Lock — Crank-rocker mechanism driven by DC motor converts rotation to flapping. Tail servo provides pitch control.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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