Toilet Night Light Kit with Arduino Nano + LDR
Motion-Activated Toilet Night Light Kit: Build with Arduino Nano & LDR
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 a toilet light that glows gently the moment you step near at night—no switches, no blinding glare. This kit lets you build exactly that: a PIR motion sensor triggers a 12-LED WS2812B ring installed under the rim only when ambient light is low, keeping it off during the day. Perfect for children, elderly family members, or anyone who wants a safer nighttime bathroom visit.
What You'll Build
A compact, breadboard-based circuit that senses motion and darkness simultaneously. When you enter the bathroom at night, the LED ring lights up for 60 seconds in a soft, colorful glow. The LDR ensures it never activates in daylight, saving power. You'll leave with a working smart home prototype that can be tucked discreetly under any toilet seat rim.
What You'll Learn
- How to interface a PIR motion sensor with Arduino Nano to detect human presence
- Using an LDR with a resistor divider to read ambient light levels
- Programming addressable WS2812B LEDs for custom lighting effects
- Assembling and debugging a real-world automation circuit on a breadboard
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Nano | x1 |
| HC-SR501 PIR | x1 |
| LDR | x1 |
| WS2812B 12-LED Ring | x1 |
| 470Ω Resistors | x5 |
| 10kΩ Resistors | x5 |
| 400-pt Breadboard | x1 |
| M-M Wires | x20 |
| 5V 1A PSU | x1 |
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
CBSE Class 9–12 students keen on smart home projects, ATL Tinkering Lab participants preparing for innovation fairs, and B.Tech ECE/EEE first-year students needing a quick breadboard demo. It’s equally suited for parents seeking a safe, screen‑free DIY activity with kids aged 10+—no soldering required.
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 talk to the AI companion tailored for this kit. It will diagnose your issue instantly, and if you still need help, WhatsApp us for a human backup.
Can I install this in any type of toilet?
Yes, the LED ring and sensor module are compact enough to tuck under any standard toilet rim with adhesive tape (not included). The circuit remains on the breadboard outside the wet area.
Does the night light work in complete darkness?
Absolutely. The LDR detects the absence of light and enables the PIR only when ambient light falls below a threshold, so it triggers exclusively at night or in a dark bathroom.
Is the electronics kit safe for bathroom use?
The circuit runs on 5V DC from a wall adapter, well away from water sources. Always mount the breadboard and power supply outside the bathroom or far from splashes, and follow the safety guide included.
PIR triggers WS2812B LED ring under toilet rim for 60 seconds at night when motion detected.
What's in this kit
- Arduino Nano
- HC-SR501 PIR
- LDR
- WS2812B 12-LED Ring
- 470Ω Resistors x5
- 10kΩ Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- 5V 1A PSU
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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