7-Segment Countdown Timer Kit with Arduino Uno
Arduino Uno 7-Segment Countdown Timer Kit: Build a Visual Countdown from 99 to 00 with Buzzer
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 powering up a bright 4-digit display that counts down seconds precisely from 99 to 00, beeping loudly when time’s up—perfect for board game turns, timed quizzes, or a kid’s first homemade stopwatch. This kit turns that idea into a real circuit you build and program yourself.
What You'll Build
You'll assemble a compact Arduino-based timer that shows a live countdown on a TM1637 4-digit 7-segment display. Two tactile buttons let you start a fresh 99-second countdown or reset anytime. At zero, an active buzzer sounds off, making it a satisfying, attention-grabbing alarm.
What You'll Learn
- How to wire and program a TM1637 4-digit 7-segment display
- Using tactile buttons to trigger resets and actions in code
- Generating audible alerts with an active buzzer
- Creating a simple state machine for countdown logic
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| 4-digit TM1637 | 1 |
| Tactile Button | 2 |
| Active Buzzer | 1 |
| 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
This kit is tailored for young learners in ATL Tinkering Labs, CBSE Class 9-12 science projects, and first-time Arduino explorers. B.Tech ECE students will also appreciate the clear TM1637 interfacing example, while parents and educators love the built-in guidance for structured, screen-free building.
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?
Open the AI build companion via the QR code on the box. It provides step-by-step debugging specific to this countdown timer circuit, and you can always message us on WhatsApp for human help.
Does the timer work without a computer once programmed?
Yes. After uploading the code, the Arduino runs standalone from a 9V battery (snap included), so you can use the timer portably anywhere.
Can I change the countdown time?
Absolutely. The example code starts at 99 seconds, but you can modify it to any two-digit number by changing a single variable. The AI companion walks you through it.
Is soldering required?
No soldering at all. Everything plugs into the breadboard with jumper wires, making the kit completely reusable and beginner-friendly.
4-digit TM1637 display counts down from 99 to 00 seconds with buzzer at zero. Button resets.
What's in this kit
- Arduino Uno R3
- 4-digit TM1637
- Tactile Button x2
- Active Buzzer
- 10kΩ Resistors x5
- 400-pt Breadboard
- M-M Wires x15
- 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