Pulse heart rate sensor Arduino open source hardware development pulse sensor

6S 15A 25.2V PCB BMS Protection Board For 6 Pack 18650 Li-ion Lithium Battery

500mA Mini Solar Charger Board CN3065 Lithium Battery Charge Chip DIY Module

1PCS EEPROM memory module AT24C128 I2C interface module Board

Capacitive Soil Moisture Sensor Corrosion Resistant for Arduino Moisture DIY

MAX30102 chip heart rate oxygen concentration pulse detection sensor module

LM2596S high-power step-down DC-DC adjustable voltage regulator power module

Active Single Phase Voltage Transformer Sensor Module for Arduino Mega ZMPT101B