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Team BYokaira Cabrera
Chavonna Spencer
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Our group designed a device, which monitors heart rate by using variation in absorption of light through the finger.
B.
C.
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The amount of blood in the finger limits the amount of light absorbed by the photodiode.
Electro Magnetic Spectrum
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Charge Current Resistance Voltage
A.
B.
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LED Photodiode Breadboard
A.
B.
C.
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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
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Table Representing Nine Different Voltages
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Equipment Set Up- Heart Rate Monitor- Photodiode Circuit- LED Circuit
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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
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Maximum Frequency How Heart Rate Was Calculated Best Working LED (IR)
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Dave_Green_LED Chavonna_Purple_LED
Chavonna_IR_LEDYokaira_Red_LED
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Chavonna Before Running Chavonna After Running
83bpm 170bpm
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Chavonna: IR LED Chavonna: Super Red LED
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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
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Jackie Bortiatynski Jody Markley (Director of UBMS) Derek James (Assistant Director of UBMS) Professor Alexay Kozhevnikov SEECoS David McLaughlin Pam Monk
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