Grow Light Schedule Controller Kit with Arduino Uno + Relay
Arduino Grow Light Controller Kit — Automate 16-Hour Photoperiods for Healthy Plants
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Indoor gardeners know inconsistent light confuses plants. This Arduino-based grow light controller delivers a rock-steady 16-hour daily photoperiod, keeping herbs, microgreens, and ornamentals thriving even in windowless rooms. The DS3231 real-time clock triggers a relay at sunrise and sunset, while a manual override button lets you test or adjust instantly.
What You'll Build
You’ll assemble a fully functional grow light timer using an Arduino Uno and precise RTC. The relay switches your grow light on at a set morning hour (say 6 AM) and off 16 hours later, displayed on a 16x2 LCD. Two tactile buttons provide manual on/off override without breaking the programmed schedule — ideal for quick plant checks or photo periods during cloudy days.
What You'll Learn
- Interface a DS3231 RTC with Arduino for drift-free timekeeping
- Control high-voltage grow lights safely using a 5V relay module
- Program a 16-hour photoperiod schedule with manual override logic
- Display time and relay state on a 16x2 LCD with I2C backpack
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DS3231 RTC | 1 |
| 5V Relay Module | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| Tactile Button | 2 |
| 4.7kΩ Resistors | 5 |
| 1N4007 Diode | 3 |
| 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
It’s an ideal introduction to automation for CBSE Class 11-12 students, a quick prototype for B.Tech ECE/EEE smart home projects, and a practical tool for ATL Tinkering Labs and Smart India Hackathon teams. Hobbyist indoor gardeners without coding experience will also find the step-by-step build accessible — no soldering required, just plug-in breadboard connections.
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 chat with our AI companion trained on this project, or reach out via WhatsApp for human help within hours.
Can I program a custom light schedule, like 12 hours on, 12 off?
Absolutely. The Arduino code is open and editable; you can change the on/off times using the RTC library. Our AI companion can guide you through the modification.
Do I need any tools or soldering for this kit?
None. All connections are made on a breadboard with pre-cut jumper wires. The relay module and LCD connect with screw terminals and headers.
Will this controller work with my 220V LED grow light?
Yes. The 5V relay module safely switches up to 250V AC / 30V DC at 10A, compatible with standard Indian mains-powered lights. Connect the high-voltage side through a terminal block (not included) for safety.
DS3231 controls relay grow light for 16-hour photoperiod with manual override button.
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