Photoplethysmography

Build a heart beat monitor using Arduino and Processing.

Components:

1x IR LED

1x Photodiode/Phototransistor

1x Trimpot

1x 22uF cap

1x 10uF cap

1x 4.7uF cap

1x 220nF cap

1x LM324

2x 100k resistor

2x 2.2k resistor

1x 1.8k resistor

1x 1.8M resistor

1x 100w resistor

1x 47w resistor

Step 1: The Sensor

Step 2: Schematic

Arduino 5v to VCC.

Arduino GND to GND.

Arduino A0 to Out.

Step 3: Code

Step 4: Test It