TeleHealth Module

The 25 dollar BioSign/TeleHealth

• Plugs into left USB, LineIn, LineOut
• USB for power
  • USB ADC?
    • If so, AVR/Amtel is the way to go
    • http://www.atmel.com/dyn/resources/prod_documents/doc3302.pdf
    • http://www.atmel.com/dyn/resources/prod_documents/6120s.pdf
• Manual-Switched input selector
• Comprised of
  • Pulse Oximeter
    • IR LED
    • Red LED
    • Photodiode
    • Op-Amp Chain
      • Outputs into line-in
  • Stethoscope
    • Audio pickup(mic)
    • Audio amplifier
      • Outputs into line-in
  • Blood Pressure Cuff
    • Electroconstrictive polymer
    • Audio pickup(mic)
    • Audio amplifier
      • Outputs into line-in
  • Electrocardiogram
    • Analog Filters
    • Op-Amp Chain
      • Outputs into line-in

How To Do It

• reuse Op-Amp Chains
  • LM324
• reuse Audio Amp circuits
  • Patch into existing audio I/O channels?

Resources

• http://www.olpcnews.com/use_cases/community/medical_application_community.html
• http://www.avrfreaks.net/