Pulse sensor Hw-01

HW‑01 Precision Pulse Sensor – Quick, Accurate Heart‑Rate Sensing

The HW‑01 Pulse Sensor is a compact photoplethysmography (PPG) module designed for real‑time heart‑rate monitoring in wearable and embedded systems. It features a tunable RGB LED array, a high‑sensitivity photodiode, and on‑chip analog‑to‑digital conversion. The sensor delivers clean, low‑noise analogue voltage proportional to blood‑volume changes or can output a packetized serial data stream via I²C for seamless integration with microcontrollers.

Built for low power drain (<20 mA typical at 3.3 V) and rugged operation, the HW‑01 runs on a single 3.6 V Li‑Po cell. The module measures just 18 mm × 18 mm, making it ideal for wrist‑mounted wearables, bedside monitors, or research platforms.

• Key Spec 1: 3.3 V / 5 V supply, <20 mA typical current, 1 dBi optical gain
• Key Spec 2: Optical bandwidth 650‑850 nm, 50 µs sampling window, <0.3 % coefficient of variation in HR
• Key Spec 3: I²C slave address 0x68, configurable data rates up to 250 Hz
• Common Use Case: Integrated into fitness trackers, portable ECG monitoring kits, or smart medical alert systems to provide continuous heart‑rate tracking and arrhythmia detection.