This document describes a microcontroller-based heart rate meter that measures heart rate using a light-dependent resistor (LDR) to sense blood flow into the finger. The LDR signal is amplified and processed by a microcontroller before the heart rate is displayed on a 7-segment display. The device is portable, has low power consumption, and can be used for heart rate monitoring in fitness centers or rural areas with limited medical facilities, though it may not be as precise as other methods. Future improvements could include storing heart rate data, sending alerts by email, and measuring additional biometrics.

1. MICROCONTROLLER BASED
HEART RATE METER
CHETANA NAIR
PALLAVI SURYAVANSHI
RUCHI SOAM
SANGEETA CHALWADI

2. CONTENT
• INTRODUCTION
• BLOCK DIAGRAM
• DESCRIPTION
• CIRCUIT DIAGRAM
• ADVANTAGES &
DISADVANTAGES
• APPLICATIONS
• FUTURE SCOPE

3. INTRODUCTION
This project explains how a single chip
microcontroller can be used to analyze
heart beat rate signals in real time.
Here heart rate is measured by
employing the pulse method i.e blood
flow into the finger.

4. BLOCK DIAGRAM
AMPLIFIER
& FILTER
MICROCONT
ROLLER
BUFFER DISPLAY
CLOCK
POWER SUPPLY

5. DESCRIPTION
• When blood flows during the systolic stroke of
the heart, the finger gets its blood via radial
artery of the arm.
• The blood flow into the finger can be sensed
photo electrically using LDR.
• The photocurrent is converted into voltage and
amplified by an operational amplifier.
• The microcontroller processes the signal and the
heart rate is displayed using 7-segment display.

6. PROCESS

7. HARDWARE DESCRIPTION

9. ADVANTAGES & DISADVANTAGES
• PORTABLE
• LOW POWER
CONSUMPTION
• EASY TO USE
• NOT PRECISE
• REQUIRES A LIGHT
SOURCE

10. APPLICATIONS
• HEART RATE MONITORING IN FITNESS
CENTER.
• FOR ATHELETES
• IN RURAL AREAS WHERE MEDICAL FACILITIES
ARE LIMITED.

11. FUTURE SCOPE
• STORING THE HEART RATE
IN A MEMORY.
• CONNECTING WITH E-MAIL
TO SEND ALERT MESSAGES.
• INCLUDING OTHER BIO-
MEDICAL SIGNALS LIKE
BREATHING RATE ALONG
WITH
HEART RATE.