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The red and green running lights are generally wired serially
 Power: The HML-LED25WRE spotlight offers several detachable cord options for low voltage operation
/Canada UL Listed Class 1 Divisions 1 & 2 for areas where flammable chemical/petrochemical vapors exist or have the potential to exist
The HAL-EMG-24-2L-LED-BMSW-113 is weatherproof and provides operators in hazardous locations with a highly efficient
Pulse Oximeter and Heart Rate Sensor - MAX30101 & MAX32664 (Qwiic) $50 - $100 The red and green runningThe SparkFun Pulse Oximeter and Heart Rate Sensor is an I2C based biometric sensor, utilizing two chips from Maxim Integrated: the MAX32664 Biometric Sensor Hub and the MAX30101 Pulse Oximetry and Heart Rate Module. While the latter does all the sensing, the former is an incredibly small and fast Cortex M4 processor that handles all of the algorithmic calculations, digital filtering, pressure position compensation, advanced R wave detection, and