Team BYokaira Cabrera

Chavonna Spencer

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

B.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