MA Light controll Module | Marine Assistant

Powerful, flexible, and designed for reef keepers. The PWM Module provides precise multi-channel LED control for custom lighting systems, enabling advanced dimming, scheduling, and automation.

Beyond lighting control, the module includes dual PWM fan outputs and support for a DS18B20 temperature probe, allowing intelligent temperature monitoring and automatic cooling management. A dedicated WS281x LED port also enables the integration of addressable RGB LEDs for status indication, ambient lighting, or custom visual effects.

Use it to build a complete DIY fixture, repair a failed controller, or upgrade an existing aquarium light with modern control capabilities.

Feature List:

Multi-channel PWM LED control
Smooth dimming and intensity adjustment
Fully programmable lighting schedules
Compatible with Mean Well LDD and similar drivers
Modular architecture for easy expansion
Ideal for custom builds, repairs, and upgrades
Optimised for reef aquarium applications
Open and flexible platform for DIY projects

How the Modular System Works

1. PWM Module (This Module)

Creates the dimming and control signals.

2. Power Driver Module

Converts the PWM signals into controlled LED current.

3. LED Module

Contains the LEDs, optics and heatsinking.

While dedicated Power Driver and LED modules are planned for future release, compatible solutions can already be created using readily available components such as Mean Well LDD drivers and LEDs of your choice.

What Can You Use It For?

Build a Complete Custom Reef Light

Perfect for DIY reef keepers wanting full control over spectrum and layout.

Repair a Failed Light

Replace a damaged or obsolete controller while retaining existing LEDs and drivers.

Upgrade an Existing Light

Add advanced control features to older fixtures that have limited or failed electronics.

Experimental Lighting Projects

Suitable for refugiums, coral grow-out systems, freshwater planted tanks, and other LED lighting projects.

Build & Assembly

The PWM Module has been designed with DIY builders in mind. All components are clearly labelled on the PCB, and the assembly process follows standard through-hole and surface-mount soldering techniques. Whether you're building a complete custom reef light, repairing an existing fixture, or experimenting with your own lighting design, the board can be assembled using commonly available tools.

Before starting assembly, take a few minutes to identify all components and verify that your kit contents match the bill of materials. Working methodically will help ensure a reliable build and reduce troubleshooting later.

Guidelines for PCB Soldering

For the easiest build experience, install components in order of height:

Low-profile resistors, capacitors and ICs
Small signal components
Connectors and headers
Larger components and terminal blocks

Building in this sequence makes soldering easier and helps keep components seated correctly against the PCB.

Inspection & Testing

After assembly, carefully inspect all solder joints for bridges, cold joints, or missed connections. A visual inspection can often identify issues before power is applied.

Once you're satisfied with the assembly:

Verify power input polarity
Check for shorts between power rails
Confirm connector orientation
Perform an initial power-up test

Verify communication and PWM outputs

Taking a few extra minutes during inspection can save significant troubleshooting time later.

Example Projects & Conversions

.... Work In progress

Technical Information

Include:

14 PWM Channels
variable PWM frequency
Onboard Real time Clock
12v Input voltage
Dimensions: 97x28mm
Connectivity: USB, Wifi
Firmware support for ESPhome/Home assistant. (Standalone in development)
2x 4wire Fan outputs
1x ds18b20 Temp sensor port
1x ws2818 Programable LED output (SPI)

Compatibility

Tested Drivers
Mean Well LDD Series
Future Driver Module

Compatible LEDs

Cree
Luxeon
Bridgelux
Generic constant-current LED systems

Existing Light Upgrades