Easy Pulse Sensor (Version 1.1) Overview (Part 1 ...
Quick overview of Easy Pulse. The Easy Pulse sensor is based on the principle of photoplethysmography (PPG) which is a non invasive method of measuring the variation in blood volume in tissues using a light source and a detector.Heart rate measurement from fingertip Embedded Lab
Circuit Diagram. The signal conditioning circuit consists of two identical active low pass filters with a cut off frequency of about 2.5 Hz. This means the maximum measurable heart rate is about 150 bpm.SparkFun RS232 Shifter SMD PRT 00449 SparkFun ...
Before purchasing this part you need to know if you have a condition called UART dyslexia. This is a neurological disorder that will render you incapable of properly wireing this device no matter how my times you triple check the the wiring.Arduino I2C Master Library UPDATED dsscircuits
This looks like it'll be quite useful though a write function that doesn't take a registerAddress might be nice. Some homebrew I2C devices don't seem to use a register address for writes (which confuses me), and other I2C devices (like the 24LC256 EEPROM) use multi byte addresses.Archives Scott Hanselman
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