In the world of LED lighting, customization often means taking a standard product and transforming it into something entirely different. Sometimes, the most interesting projects come from reimagining what a product can do.

This is exactly what happened with a recent project involving a strobe warning light — the type commonly used on passenger vehicles, trucks, school buses, and engineering vehicles to alert other drivers.

The client had a vision: take a standard single-color strobe light and turn it into an SPI-controlled RGB pixel light using the UCS1903 protocol.

Here is how we brought that vision to life.

The Challenge: From Single-Color Strobe to SPI Pixel Light

The standard strobe warning light is simple:

The client's requirement was completely different:

This meant we needed to completely redesign the internal lighting system while keeping the same housing and form factor.

Our Solution: A Custom PCB Design

The existing strobe light structure was never designed for SPI control or RGB LEDs. We had to start from scratch.

The Internal Structure Challenge

Inside the warning light housing, space was limited. The client's requirements included:

Component	Requirement
Bottom PCB	A round PCB at the base
LED strips	8 rigid LED strips (10cm each) arranged around the perimeter
Connection	All 8 strips connected in series
Control	SPI (UCS1903)

The Design

We designed a custom PCB system consisting of:

Component	Specification
Round base PCB	Holds the ICs and provides structural support
8 rigid LED strips	10cm length, 6 LEDs per strip (SMD5050 RGB)
Total ICs	8 UCS1903 ICs (1 per strip)
Total LEDs	48 SMD5050 RGB LEDs (8 strips × 6 LEDs)
Voltage	DC24V
Waterproof rating	IP65–IP66
Connector	3-pin black parallel wire (30cm), 3-pin waterproof M8 male connector

Space Constraints: A Real-World Adjustment

One significant challenge we encountered was the internal space limitation. The actual internal length of the housing was only 7.5cm — not enough for 10cm strips.

We adjusted the strip length to 7cm to ensure a proper fit without compromising the structural integrity of the housing.

This adjustment required careful re-engineering of the PCB layout to maintain the correct spacing and interconnection between strips.

Wiring and Connection Design

Serial Connection of Strips

The 8 rigid strips are connected in series, not in parallel. This means:

Data flows from one strip to the next (daisy-chain)
Each strip has its own UCS1903 IC
All 48 LEDs are individually addressable

Connection	Details
Strip connection	Series (daisy-chain)
IC per strip	1 UCS1903 (8 total)
LEDs per strip	6 SMD5050 RGB (48 total)
Control protocol	SPI (UCS1903)

Waterproof Connector

The client specified a 3-pin M8 waterproof male connector, compatible with:

3-core black parallel wire (with white edge for polarity identification)
UCS1903 LED strip systems (plug-and-play compatibility)
Screw-locking mechanism for secure connection

Final Product Specifications

Component	Specification
Base PCB	Round PCB (custom design)
LED strips	8 × 7cm rigid strips (6 LEDs/strip)
Total LEDs	48 SMD5050 RGB
IC type	UCS1903 (8 ICs)
Voltage	DC24V
Waterproof rating	IP65–IP66
Connector	3-pin waterproof M8 male (screw-lock)
Wire	30cm 3-core black parallel wire (with white edge)
Control protocol	SPI (UCS1903)

Applications

This custom solution is versatile and can be used in:

Key Benefits of This Custom Design

Lessons Learned

Final Thoughts

What started as a simple request — "Can you make a strobe light with SPI control?" — turned into a full custom PCB design project involving 8 rigid strips, 48 RGB LEDs, and 8 UCS1903 ICs in a compact housing.

The result is a product that transforms a standard single-color warning light into a fully programmable RGB pixel light — suitable for vehicles, stage productions, architectural accents, and custom LED projects.

If you have a standard product that you want to reimagine with SPI control, custom PCB design, or RGB LEDs, we are ready for the challenge.

Looking for Custom LED Lighting Solutions?

We specialize in custom PCB design, SPI/DMX integration, and custom LED strip configurations. Tell us your requirements, and we will help you bring your vision to life.

👉 Contact Us Today to discuss your custom lighting project.