Team B Yokaira Cabrera Chavonna Spencer

B.

 Our group designed a device, which monitors heart rate by using variation in absorption of light through the finger.

C.

 The amount of blood in the finger limits the amount of light absorbed by the photodiode.

 Electro Magnetic Spectrum

    Charge Current Resistance Voltage A.

B.

   LED Photodiode Breadboard A.

B.

C.

   Testing Different LEDs for which had highest Voltage With Finger & without Finger Use of Amp Meter to measure 75% of Absolute Maximum Current Breadboard Circuitry

Table Representing Nine Different Voltages

 Equipment Set Up Heart Rate Monitor Photodiode Circuit LED Circuit

  Began to Test Heart Rate Monitor Made sure we did not cut off our circulation Filtered out ambient light (pictures of frequency transitions)specifically 1,000Hz) 1-10Hz 10-100Hz 100-1000Hz 1000-10000Hz

   Maximum Frequency How Heart Rate Was Calculated Best Working LED (IR)

Dave_Green_LED Chavonna_Purple_LED Chavonna_IR_LED Yokaira_Red_LED

Chavonna Before Running Chavonna After Running 83bpm 170bpm

Chavonna: IR LED Chavonna: Super Red LED

   We were able to get the heart rate monitor to work The IR work best for all skin tones The Red LED did not work for darker skin tones

       Jackie Bortiatynski Jody Markley (Director of UBMS) Derek James (Assistant Director of UBMS) Professor Alexay Kozhevnikov SEECoS David McLaughlin Pam Monk