Tracker

Reference design: 850 nm LED + UWB tracker puck

Name: Reference design: 850 nm LED + UWB tracker puck
Brand: HOLON reference BOM

HOLON reference BOM · HK / Shenzhen · updated 2026-09

Starting architecture for a training-grade tracker with raw data and >10 devices per headset.

FIG. — Tracker

Emitters	8–12 × SFH 4253-class 850 nm IR LEDs, pulsed to headset exposure
IMU	ICM-42688-P, 1 kHz, SPI, external clock input
MCU	STM32L432 (Cortex-M4F, 80 MHz) or UWB SoC M33
UWB	QM35825 (ranging + AoA)
Power	150–250 mAh Li-Po; BQ24074 charger
Mechanics	35–45 mm Ø, < 15–18 mm, 20–25 g target
Price band	BOM priced from public distributor listings
Practices	Robot-learning data hardware

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Specifications from supplier documentation; they change between batches — we confirm the exact variant before ordering.

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