The device is composed of an amplifier/filter and a microprocessor unit, everything surrounded by a metallic box to avoid interferences.
Safety warning: DO NEVER use devices like this with a regular computer, as it is not isolated from the electrical power network. It may kill you in case of an electrical anomaly!
Information about the authors: we are students living in Portugal and we developed this device for our school project named Palpita-me! (Beat in me!, says the heart). With our project we intend to alert the school community and the general public to the importance of the prevention of cardiovascular diseases. We are studying issues such as the circulatory system, its anatomy, physiology and measurable parameters, relevant diagnostic techniques (especially electrocardiography), hospital services and emergency, telemedicine, statistics and risk factors.
Take good care of your heart so that it will beat inside you for many happy years to come!
Feel free to visit our website and leave us a comment. We'd love hearing from you!
Step 1: Plans, schematics and board layout
The microprocessor unit was made by a member of our team some years ago and at its core lies a PIC microcontroller.
To plot data on a laptop screen, we needed software that could simulate an oscilloscope. For that we used the excellent (and free) Oscilloscope.dll, written by Michael Bernstein. We thank him for his kind support.
Furthermore, we also prepared a list of components that is just too big to show up here. From our website, you can download this list, every schematic and layout we've made.