I'm building another one (many prototypes shown on youtube, and other places) pulseoximeter.
But I'd like to make it's source and hardware open, to make it easy for everyone to use it with arduino or other devices.
The goal is to build a separate digital/analog sensor
(both digital and analog outputs are possible) for arduino and other devices (like andriod smartphones) with possibility to log data for future reference.
As for now I have working prototype that graphs pulses on computer based on data from serial port.
In a day or two I plan to complete code for detecting pulses (maybe with comparator).
Device built with low-cost, widely used components, processing with arduino and processing (http://processing.org/
) for displaying data on PC for testing purposes.
I'm working on signal processing now to output data in digital form.
I have no any project page, hope to do some pictures and videos this weekend.
I'd like to know, if it's interesting to someone and maybe some suggestions on the right direction to move further.