Top: an Arduino Uno connected to a pulse sensor and an LED on a breadboard.īottom: a LilyPad Arduino with a pulse sensor and LEDs sewn onto a headband. Materials to build a case or enclosure for your circuit.Tutorials and Arduino code libraries are available online for most of these parts. An output device for your circuit, like LEDs, a buzzer, or a screen/display.For wearable/sewable circuits, you will need a needle and conductive thread. Circuit parts, such as a breadboard, jumper wires, and resistors.A cable to connect your Arduino to your computer so you can program it.A power supply, either a DC wall adapter or a battery.You can also consult the Getting Started guide for your particular Arduino board. You can usually find these items in the "Related Products" or "Hookup Accessories" section on the SparkFun website. The exact accessories you need will depend on the type of Arduino you purchase. For a wearable heart rate monitor, check out the LilyPad Arduino product line.If you are building a stationary/bedside heart rate monitor, the.Most of the parts you need should be available from an electronics vendor like SparkFun Electronics or Adafruit Electronics. Once you design your heart rate monitor, use this page as a starting guide for what parts to purchase. See the Procedure for help getting started with the design process. That means that exactly what you need to buy will depend on what you want to build. This page contains information about the engineering design process: If you have never prototyped circuits with a breadboard before, this page will be very useful: This website contains tutorials and example code for the pulse sensor you will use in this project: This resource will help you decide which Arduino board is right for your project: What it means, and where on Apple Watch you'll find it. This page explains how one type of smartwatch measures heart rate: How are they similar? How are they different? How are they designed for different situations? Look at the devices in Figures 1 and 2.What are some different scenarios where someone would want to monitor their own or someone else's heart rate?.What are the different physical methods used to measure heart rate?.However, since this is an open-ended project, you will need to do some of your own research. The Bibliography contains some resources that will help you get started, and the Materials section contains some suggestions for materials. How you build the circuit and what it does will depend on how exactly you expect it to be used. In this project, you will use the engineering design process to design, build, and test your own heart rate monitor circuit. A wearable heart rate monitor, including a chest strap and a wristwatch. All of these types of heart rate monitors involve electrical circuitry, computer programming, a case or enclosure for the circuit, and a way to display or relay the information to the user.įigure 2. This method is called photoplethysmography, and is how the sensor used in this project works. Since red blood absorbs green light, the amount of light reflected back changes as blood pulses through tiny blood vessels near the surface of the skin. Some of these use a green light-emitting diode (LED) aimed at the skin, and measure the amount of light reflected back. Many modern smartwatches can measure heart rate directly on the wrist. Some of these require a chest strap (Figure 2), which takes electrical measurements similar to an EKG machine. Others are portable, sometimes worn recreationally and used to track heart rate during workouts. These are commonly found in hospital rooms or ambulances (Figure 1). Some, called electrocardiogram machines (abbreviated ECG or EKG), measure your pulse and detect other information from electrical signals from the heart using electrodes placed on the body. There are many different types of heart rate monitors. A heart rate monitor is a device that measures your heart rate, or pulse, usually in beats per minute (BPM).
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