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Silver circles with traces are positioned above and below a pressure-sensitive layer
with this I2C interface module
and humidity from 20 to 80% with 5% accuracy
RS232 to TTL Converter (MAX232) is widely used in the world of microcontrollers
Heart Rate (Pulse) Sensor Photo Interrupter Silver circles with traces areIntroduction : Pulse Sensor is a well designed plug and play heart rate sensor for Arduino. It can be used bystudents, artists, athletes, makers, and game & mobile developers who want to easily incorporate live heart rate data into their projects. The sensor clips onto a fingertip or earlobe and plugs right into Arduino with some jumper cables. It essentially combines a simple optical heart rate sensor with amplification and noise cancellation
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