Thermocouples are very sensitive, requiring a good amplifier with a cold - compensation reference. The Grove - Temperature Sensor USES a K type thermocouple Temperature detection, with a Thermistor to detect The ambient Temperature as Temperature compensation.
Grove - Finger-clip Heart Rate Sensor with shell is based on PAH8001EI-2G, a high performance and low power CMOS-process optical sensor with Green LED and DSP integrated serving as a Heart Rate Detection(HRD) sensor.
The best helper, third-hand is a very useful tool for holding, soldering, magnifying, It comes with a sturdy stand, two clamps and a 2x optical magnifying glass. With the third-hand, you can get rid of the confusions while soldering tiny printed circuits.
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