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Dimmer Module HL, 1 Channel, 3.3V/5V logic

https://www.rbdimmer.com/web/image/product.template/7/image_1920?unique=f143ec2
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AC dimmer for medium-power loads such as heaters, motors, pumps, and ventilation systems (16A / 24A versions available).

Smooth AC voltage regulation for precise control, not just on/off switching.

Effective cooling system with a heatsink (active cooling fan on 24A version).

Compatible with Arduino, ESP32, and other microcontrollers (supports 5V/3.3V logic).

Integrations: Works with ESPHome (Home Assistant), Tasmota, and custom automation projects.

Arduino control via  rbdimmerESP32.h library for easy implementation.

Energy-saving features – schedule operations and optimize power consumption.

Electrical isolation for safe microcontroller operation.

$ 7.99 7.99 USD $ 7.99 Tax Excluded

$ 54.40 Tax Excluded

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Dimmer 24A


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The AC Dimmer (16A / 24A) is a DIY module—not a finished device—that integrates into your project by connecting to a microcontroller. It is designed for medium-power applications, providing smooth control of heaters, motors, pumps, and ventilation systems, making it ideal for home automation and industrial projects.

Reliable Performance & Efficient Cooling

  • The 16A model includes a passive heatsink for heat dissipation.
  • The 24A model features a larger heatsink and an active cooling fan for enhanced heat management during prolonged operation.

Flexible Control & Automation

With our detailed documentation and tutorials, you can easily integrate the dimmer into your automation setup. Possible use cases include:

  • Precise temperature control – Regulate heating elements with temperature sensors.
  • Smart motor control – Adjust the speed of pumps, compressors, or ventilation systems.
  • Home automation integration – Connect to Home Assistant via ESPHome or use Tasmota for cloud-based control.
  • Energy efficiency – Program schedules to optimize power consumption and reduce electricity costs.

Easy Microcontroller Integration

The dimmer is designed with electrical isolation, ensuring safe operation with microcontrollers. It supports both 5V and 3.3V logic levels, making it compatible with Arduino, ESP32, and other platforms. The  rbdimmerESP32.h  library simplifies control, handling timing and interrupts for precise voltage regulation.

Whether you're working on home automation, industrial control, or custom automation projects, our comprehensive guides and support resources will help you integrate and optimize the dimmer for your needs.