Interfacing Pulse Sensor with Raspberry Pi 3 ❤️

🎯 Objective

To detect heartbeats using a Pulse Sensor and monitor pulse rate on a Raspberry Pi 3 using an MCP3008 ADC.

🧰 Components Required

Component	Quantity
Raspberry Pi 3	1
Pulse Sensor	1
MCP3008 ADC	1
Jumper Wires	As required
Breadboard	1

⚡ Circuit Connections

Connect the Pulse Sensor to MCP3008 and Raspberry Pi 3 as follows:

Pulse Sensor Pin	Connect To
VCC	3.3V (RPi Pin 1)
GND	GND (RPi Pin 6)
Signal	CH0 of MCP3008

🔄 MCP3008 to Raspberry Pi Connections

MCP3008 Pin	RPi Pin
VDD, VREF	3.3V (Pin 1)
AGND, DGND	GND (Pin 6)
CLK	GPIO11 (Pin 23)
DOUT	GPIO9 (Pin 21)
DIN	GPIO10 (Pin 19)
CS/SHDN	GPIO8 (Pin 24)

🧠 Python Code

import spidev
import time

spi = spidev.SpiDev()
spi.open(0, 0)
spi.max_speed_hz = 1350000

def read_channel(channel):
    adc = spi.xfer2([1, (8 + channel) << 4, 0])
    data = ((adc[1] & 3) << 8) + adc[2]
    return data

try:
    while True:
        pulse_value = read_channel(0)
        print("❤️ Pulse Sensor Reading:", pulse_value)
        time.sleep(0.1)

except KeyboardInterrupt:
    spi.close()

📊 Output

• Prints analog values that represent the pulse waveform.
• Can be plotted or used to count BPM (beats per minute).

💡 Applications

• Heart rate monitoring
• Wearable fitness devices
• Health monitoring systems

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🎯 उद्दिष्ट

Pulse Sensor वापरून हृदयाचे ठोके (Pulse) मोजणे आणि Raspberry Pi 3 वर त्याचे वाचन करणे.

🧰 लागणारे साहित्य

घटक	संख्या
Raspberry Pi 3	1
Pulse Sensor	1
MCP3008 ADC	1
जंपर वायर	गरजेनुसार
ब्रेडबोर्ड	1

⚡ सर्किट कनेक्शन

Pulse Sensor पिन	जोडणी
VCC	3.3V
GND	GND
Signal	MCP3008 च्या CH0 वर

🔄 MCP3008 ते Raspberry Pi कनेक्शन

MCP3008	RPi पिन
VDD, VREF	3.3V
AGND, DGND	GND
CLK	GPIO11
DOUT	GPIO9
DIN	GPIO10
CS/SHDN	GPIO8

🧠 पाइथन कोड

import spidev
import time

spi = spidev.SpiDev()
spi.open(0, 0)
spi.max_speed_hz = 1350000

def read_channel(channel):
    adc = spi.xfer2([1, (8 + channel) << 4, 0])
    data = ((adc[1] & 3) << 8) + adc[2]
    return data

try:
    while True:
        pulse_value = read_channel(0)
        print("❤️ Pulse Sensor वाचन:", pulse_value)
        time.sleep(0.1)

except KeyboardInterrupt:
    spi.close()

📊 आउटपुट

• Pulse Sensor चे एनालॉग वाचने दाखवते.
• हृदयाचे ठोके मोजण्यासाठी किंवा ग्राफ काढण्यासाठी वापरता येते.

💡 उपयोग

• हृदय गती मापन
• फिटनेस वाच उपकरणे
• आरोग्य देखरेख प्रणाली