Motorised Pencil Sharpener Variant 9
Build a Motorised Pencil Sharpener with Arduino & a 3-Second Timer
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Press a tactile button and a DC motor spins for exactly 3 seconds — then stops cleanly. That’s the core of every electric pencil sharpener, and this kit lets young makers build that exact timing circuit with an Arduino Uno, an L298N motor driver, and basic components. No manual cranking, no guesswork: just one button press for a perfectly timed sharpening burst. It’s a gentle introduction to robotics, motor control, and real-world programming logic.
What You'll Build
You’ll assemble a complete motorised sharpener timer on a breadboard: connect the Arduino, driver, motor, and button, then upload code that reads the button press and runs the motor for a preset 3-second window. The motor shaft acts as the drive hub for a sharpening drum — you can attach a small wheel or a foam cylinder to visualise how the mechanism would work. When you press the button, the motor engages, holds steady for three seconds, and disengages, ready for the next pencil.
What You'll Learn
- Interface a DC motor with Arduino using an L298N motor driver and understand H‑bridge logic
- Read a tactile button input and implement software debouncing for stable triggering
- Write a timer function that runs the motor for exactly 3 seconds and then stops it immediately
- Use diodes and resistors correctly for circuit protection and pull‑up/pull‑down configurations
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DC Motor 5V | 1 |
| L298N Driver | 1 |
| Tactile Button | 1 |
| 1N4007 Diode | 5 |
| 10kΩ Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 15 |
| 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
Ideal for CBSE Class 11–12 students exploring microcontroller projects in physics or computer science, B.Tech ECE/EEE first‑year learners tackling their first embedded motor control assignment, ATL Tinkering Lab innovators, and kids aged 5–15 building under adult guidance. It also fits perfectly into Smart India Hackathon junior themes and introductory workshops at IIT, NIT, VIT, or BITS campuses.
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 launch the AI companion instantly. It walks you through wiring, code, and troubleshooting. You can also send a photo via WhatsApp and our team will guide you back on track.
Can I change the 3‑second timer to a different duration?
Absolutely. The Arduino sketch is open and commented, so you can modify the delay value in the code to any length you need – for testing, demonstrations, or even a longer sharpening cycle.
Does this kit include a real pencil sharpener blade?
No. The kit focuses on the motor control electronics. You can attach a small wheel or foam disc to the motor shaft to simulate the sharpening drum. No cutting parts are included, keeping the project safe for young builders.
Is soldering required?
Not at all. All connections are made on the included 400‑point breadboard using male‑to‑male jumper wires. The entire circuit can be assembled and modified without any soldering.
Button activates DC motor driving a gear-reduced sharpening drum for timed 3 seconds.
What's in this kit
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