How PicoLume Works

Adding LED lighting to marching band props sounds simple at first. LED strips are cheap, microcontrollers are everywhere, and there are dozens of tutorials online for making things glow. But then reality sets in.

You're not lighting up a bedroom — you're trying to synchronize 20 or 30 props spread across a football field, all triggering effects at precisely the right moments in the music. The props need to survive being carried, dropped, and performed with in all weather conditions. They need to work flawlessly every time, without a laptop nearby to babysit them.

"The problem shifted from simply controlling LEDs to figuring out how to do it reliably, affordably, and consistently every single run."

Commercial systems exist, but they're expensive — often thousands of dollars before you've lit your first prop. Consumer solutions like WLED and wireless DMX can work, but they weren't designed for the unique demands of a marching field: range, interference, fast setup, and perfect timing.

PicoLume was born out of this gap. It's a system built specifically for the marching arts, where reliability and affordability matter just as much as the lighting effects themselves.

PicoLume works on a simple but powerful principle: don't stream lighting data — stream time.

Instead of broadcasting complex lighting commands over the air, each prop carries the entire show in its memory. A single transmitter just tells everyone "the clock says 12,345 milliseconds" — and every prop independently looks up what it should be doing at that moment.

This approach keeps the radio link simple and reliable. The transmitter only sends tiny 11-byte packets ten times per second. Even if a prop misses a packet or two, it coasts on its local clock until the next update arrives — no glitches, no dropouts.

Studio is where shows come to life. It's a desktop application with a timeline interface — if you've ever used video editing software, you'll feel right at home.

Import your show audio, and you'll see the waveform laid out across the timeline. From there, it's just drag and drop: pick an effect, place it where you want it to start, and stretch it to the right duration. Each track can target different groups of props, so your flags can be doing one thing while your percussion section does another.

When you're happy with your design, Studio exports a single show.bin file. This compact binary contains all your events, timing, and per-prop configuration. Copy it to your receivers and you're ready to perform.

Think of the transmitter as a metronome with buttons. It doesn't know anything about your lighting cues — it just runs a clock and tells everyone else what that clock says.

The interface is intentionally minimal: one button to toggle play/pause, one button to stop and reset. A small LCD shows the current state and elapsed time, so you always know where you are in the show.

Under the hood, it broadcasts encrypted timecode packets over 915 MHz radio using an RFM69 module. The encryption isn't about security theater — it prevents interference from other systems that might be operating nearby. And because each packet is only 11 bytes, the radio link stays clean and responsive.

Each receiver is a small unit that lives inside your props. It stores the entire show file locally and renders effects in real-time based on the timecode from the transmitter.

Getting show files onto the receivers is refreshingly simple: hold a button while powering on, and the device appears as a USB flash drive. Drag and drop your show.bin file, eject, and you're done. No Arduino IDE, no flashing, no serial terminals.

Each receiver has a unique Prop ID (1-224) stored in its memory. The show file includes a lookup table so every prop knows exactly which effects apply to it. This means you can run completely different lighting on different prop types — all from the same show file, all perfectly synchronized.

The "timecode + local playback" design wasn't an accident — it emerged from real-world testing on a marching field. Here's why it matters:

PicoLume is fully open source — the hardware designs, firmware, and Studio application are all available on GitHub.

We weren't the only band trying to solve this problem. If we faced these hurdles, chances are other programs have too. By open-sourcing everything, other bands can use it, adapt it, and improve it. A rising tide lifts all boats.