Arduino SSR AC Dimmer Kit - Smooth AC Dimming with Zero-Crossing Phase Control
Arduino SSR AC Dimmer Kit - Smooth AC Dimming with Zero-Crossing Phase Control
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Unlike triac-based dimmers prone to flicker and electrical noise, this solid-state relay (SSR) kit uses a zero-crossing detector and phase-angle control to dim AC loads safely and smoothly. You'll build a reliable mains dimmer for incandescent lamps, heaters, or motors, using the ZMPT101B voltage sensor, Arduino Uno, and a 25A SSR relay. Every component is included to go from concept to working prototype in a single afternoon.
What You'll Build
A fully functional phase-angle AC dimmer capable of controlling up to 25A of resistive or inductive loads. The 0.96-inch OLED displays real-time firing angle and power level, while the potentiometer provides smooth manual dimming. The circuit isolates the microcontroller from high-voltage AC, making it far safer than traditional triac designs - and a perfect base for IoT power control projects.
What You'll Learn
- Detect AC zero crossings using the ZMPT101B transformer-based sensor
- Implement phase-angle firing delay with Arduino microsecond timing
- Drive a solid-state relay for silent, interference-free AC switching
- Interface an OLED display and analog potentiometer for user feedback
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ZMPT101B | 1 |
| SSR Relay 25A | 1 |
| 0.96in OLED | 1 |
| 10k? Potentiometer | 1 |
| 10k? Resistors | 5 |
| 100nF Caps | 5 |
| PCB Prototype Board | 2 |
| 9V Battery Snap | 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 tailored for final-year B.Tech (ECE/EEE) students building major projects in power electronics or IoT. It's also ideal for Smart India Hackathon participants needing a reliable AC control module, and for makers at IIT, NIT, VIT, BITS, or ATL Tinkering Labs who have prior experience with mains voltage.
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?
Simply scan the QR code on the box to talk to the AI companion, or message us on WhatsApp. We'll guide you through zero-crossing calibration or code debugging step by step.
Is this kit safe for mains AC voltage experimentation?
Yes, the SSR provides galvanic isolation between the Arduino and the AC load, and the ZMPT101B sensor is inherently isolated. The included wiring guide emphasizes safety practices for handling 230V AC.
Can I control inductive loads like motors?
Yes, the 25A SSR is rated for resistive and inductive loads up to 25A. For heavily inductive loads, we recommend adding a snubber circuit - our AI companion can explain how.
Do I need an oscilloscope for debugging?
No, the OLED displays firing angle and zero-crossing timing in real time. You can fine-tune the dimming using the potentiometer without any external test equipment.
Zero crossing detector and SSR phase angle control dim AC loads smoothly. Safer than triac-based dimmers.
What's in this kit
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