First Organised Prototype

       This is the first organised prototype for this project. it is working OK now. it should be more stable in term of structure and data processing, will expect no missed data now on.

Better Prototype

Now, it is important to get more accurate and steady results by improving the prototype structure. initially I used breadboard to connect the electronic components, it is very easy way to experiment, but, heart rate sensor is vert sensitive to any minor changes in connections and will give inaccurate reads in case of there is any lose connection. So I think it is time to go to higher level of connecting, generic PCB board, wires and ironing solder work.
the image below shows the PCB iam going to use and some of the connections header and other components.