Transcript Heart Rate Monitor Using Light Transmission

Team B
Yokaira 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
A.
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Charge
Current
Resistance
Voltage
B.
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LED
Photodiode
Breadboard
A.
C.
B.
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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
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
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Maximum Frequency
How Heart Rate Was Calculated
Best Working LED (IR)
Dave_Green_LED
Chavonna_IR_LED
Chavonna_Purple_LED
Yokaira_Red_LED
Chavonna Before Running
83bpm
Chavonna After Running
170bpm
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