Smart Ceiling Fan Speed Optimizer Variant 4 Kit with Arduino Uno + LED
Smart Ceiling Fan Speed Optimizer Kit with Arduino Uno — Automate Your Fan Based on Temperature & Presence
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn a standard ceiling fan into an intelligent climate controller that adjusts speed based on room temperature and whether the room is occupied. When no one is present, the fan automatically slows down to save power; as temperature rises beyond a setpoint, it speeds up to maintain comfort. This kit lets you build a production‑grade home automation device using an Arduino Uno, a TRIAC dimmer, and precise digital sensors — no more manual regulators.
What You'll Build
You'll assemble a fully functional smart fan controller with a crisp 0.96‑inch OLED display showing real‑time temperature, fan speed percentage, and occupancy status. The unit mounts near your existing fan regulator and modulates AC power using phase‑angle control, delivering smooth, silent speed transitions. Once installed, it learns and reacts — lowering fan speed when the room is empty and ramping up as heat builds, giving you the perfect balance of comfort and energy savings.
What You'll Learn
- Phase‑angle control of AC loads using a BT136 TRIAC and MOC3021 optocoupler
- Interfacing a DS18B20 digital probe for accurate room temperature sensing
- Integrating an HC‑SR501 PIR sensor to reliably detect occupancy
- Adding a DS3231 real‑time clock to schedule fan behaviour by time of day
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| DS18B20 Probe | 1 |
| HC-SR501 PIR | 1 |
| BT136 TRIAC | 1 |
| MOC3021 Optocoupler | 1 |
| DS3231 RTC | 1 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 10 |
| 220Ω Resistors | 5 |
| 100nF Capacitors | 10 |
| PCB Prototype Board | 2 |
| 12V Adapter | 1 |
| 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
This advanced kit is engineered for B.Tech ECE and EEE students working on home automation capstone projects, Smart India Hackathon participants building energy‑efficient solutions, and hobbyists from IITs, NITs, VIT, or BITS who want a real‑world AC load control experience beyond typical sensor tinkering. It’s also ideal for CBSE Class 12 students with a strong electronics background who are ready to handle mains‑level circuits safely.
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 open your AI build companion, which walks you through every wiring step and code logic. If you still need help, our WhatsApp support responds within hours with human guidance.
Do I need prior experience with AC mains to build this kit safely?
While the control circuit runs on 12V DC, you will be wiring the TRIAC across live AC. We recommend basic electrical safety knowledge and working under supervision if you are a student. The AI companion includes a dedicated safety checklist, and WhatsApp support can guide you through the high‑voltage sections step by step.
Can I customise the fan speed curves or add Wi‑Fi control?
Yes. The Arduino Uno is fully open‑source, and all I/O pins are accessible on the prototype board. You can modify the code to create your own temperature‑speed curves, or add an ESP8266 module on the second prototype board to enable IoT control from a smartphone.
What if a component fails during assembly?
Compoden offers a 7‑day free replacement for any part with a manufacturing defect. Simply contact our Bengaluru support team, and we’ll ship a replacement part within 48 hours. The AI companion also includes troubleshooting steps for the most common build issues.
DS18B20 room temperature + occupancy PIR together set fan speed optimally via TRIAC PWM dimmer.
What's in this kit
- Arduino Uno R3
- DS18B20 Probe
- HC-SR501 PIR
- BT136 TRIAC
- MOC3021 Optocoupler
- DS3231 RTC
- 0.96in OLED
- 10kΩ Resistors x10
- 220Ω Resistors x5
- 100nF Caps x10
- PCB Prototype Board x2
- 12V Adapter
- Soldering Iron
- Solder Wire
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.
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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