4.66 out of 5 based on 90 customer ratings
(90 customer reviews )

AC power Dimmer module 4A-400V

2.29$

The AC Dimmer controls AC voltage up to 4A and 400V, ideal for lamps, heating elements, fans, and more. It’s perfect for smart home systems, smoothly adjusting light brightness. Compatible with 5V/3.3V logic, it integrates with Arduino using the RBDDimmer.h library for easy control and multiple dimmer management.
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The AC Dimmer is designed to regulate alternating current (AC) voltage, capable of handling up to 4A and 400V. It is ideal for switching on and off various devices like lamps, heating elements, fans, pumps, and air purifiers. Although it can manage a wide range of applications, we recommend operating it below the maximum capacity for long-term durability.

Dimmers are becoming increasingly popular in smart home systems for smoothly adjusting light brightness. For instance, lights can gradually turn on or off, creating a comfortable ambiance. This dimmer works well with filament lamps and performs effectively with medium to high-brightness LED lamps. However, it is not compatible with fluorescent (gas discharge) lamps.

The dimmer’s power section is isolated from the control section, ensuring that high currents do not disrupt the microcontroller. It supports both 5V and 3.3V logic levels, making it simple to connect to various microcontrollers.

For Arduino applications, the dimmer can be controlled via the RBDDimmer.h library, which uses external and process time interrupts. This simplifies coding and allows multiple dimmers to be operated from a single microcontroller. The RBDDimmer.h library and example codes are available for download from the “Documents” section or GitHub. Our library is regularly updated, so subscribing to our newsletter or checking the website for updates is recommended.

The dimmer connects to Arduino using two digital pins: one (Zero) for detecting Phase Null of the AC and triggering interrupt signals, and the other (DIM/PSM) for adjusting current. The Zero pin must be connected to specific microcontroller pins, depending on the model (e.g., Uno, Nano, Leonardo, or Mega), as it is tied to the microcontroller’s interrupt function.

Technical characteristics

Weight 0.01 kg
Dimensions 8 × 2 × 1 cm
Power

up to 400V/600V (8A~24A)

AC frequency

50/60 Hz

TRIAC

BTA16-600B/BTA24-600B

Isolation

Optocoupler

Logic level

3.3V/5V/12V

Zero point

Logic level

Modulation (DIM/PWM)

Logic level ON/OFF TRIAC

Signal current

>10mA

FrameWorks

  • Connection instruction and library
  • Example: Dimming value through the serial port
  • Example: Power ON/OFF
  • Example: Dimming with a potentiometer
  • Example: Toggle Dimming values
  • Example: Smoothly Dimming with buttons action
  • Two or more dimmers connection
  • YAML configuration entry
  • Connection GPIO details
  • Examples

Dimmers projects

Dimmer with ESP32 – Blynk IoT Platform. Arduino code, settings, Web and mobile APP.

Blynk IoT  is a full suite of software required to prototype, deploy, and remotely manage connected electronic devices at any scale: from personal IoT projects to millions of commercially connected products. With Blynk anyone can connect their hardware to the cloud and build a no-code iOS, Android, and web applications to analyze real-time and historical…
Read More Dimmer with ESP32 – Blynk IoT Platform. Arduino code, settings, Web and mobile APP.

Dimmer with ESP32 – ESP RainMaker Cloud platform + Mobile APP.

ESP RainMaker® is a complete system for building AIoT products with a minimal amount of code, empowering your team to develop and deploy secure, customized AIoT solutions. It covers all Espressif chips and modules, device firmware, voice-assistant integrations, phone apps and cloud backend. This helps you save a large investment in cloud, gain independence and focus…
Read More Dimmer with ESP32 – ESP RainMaker Cloud platform + Mobile APP.

Dimmer with ESP8266/ESP32 MQTT – Publish and Subscribe with Arduino IDE. Connecting to Home Assistant, Node-RED, Amazon AWS, and openHAB

This project shows how to use MQTT communication protocol with the ESP32 to publish messages and subscribe to topics from MQTT broker under servers like Home Assistant, Node RED, Amazon AWS, and openHAB. As an example, we’ll control the dimmer. The server can be either local or on the cloud. The ESP32 we’ll be programmed…
Read More Dimmer with ESP8266/ESP32 MQTT – Publish and Subscribe with Arduino IDE. Connecting to Home Assistant, Node-RED, Amazon AWS, and openHAB

Dimmers Q&A

How to choose AC dimmer module?

The main parameter is current power (Ampere/Watt). We recommend that the device load power value be no over than 70% of the dimmer value. Example: Dimmer 8A (230V*8A=1.8kWt), load = 8A*70%=5.6A (230V*5.6A=1.3kWt).

90 reviews for AC power Dimmer module 4A-400V

  1. Reviewer profile image
    5 out of 5

    N***s

    Works as expected! Thank you!

  2. Reviewer profile image
    5 out of 5

    Z***c

  3. Reviewer profile image
    1 out of 5

    c***n

    The product does not match the photo. The Neutre connector has disappeared and a red wheel wire of poor quality has been replaced. I am not satisfied at all.

  4. Reviewer profile image
    5 out of 5

    S***s

    All recieved in good condition, thank you!

  5. Reviewer profile image
    5 out of 5

    t***a

  6. Reviewer profile image
    5 out of 5

    B***n

    Not yet used, radiator seems undersized for use without the risk of overheating

  7. Reviewer profile image
    5 out of 5

    A***e

  8. Reviewer profile image
    5 out of 5

    AliExpress Shopper

    Good quality. library for Arduino – rbdimmer.com

  9. Reviewer profile image
    5 out of 5

    e***e

    Good product, works well for now

  10. Reviewer profile image
    1 out of 5

    J***R

    Hello,
    Fast delivery.
    Unfortunately, none of the 2 Dadders work.
    However, I respected all the prescriptions and used the manufacturer’s software.
    What to do?
    Thank you for your answer.
    J.Ch.Chevrier

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