Interfacing Flex Sensor with Raspberry Pi 3 🤸

🎯 Objective

To read the bending position of a Flex Sensor using an ADC (MCP3008) with Raspberry Pi 3. This setup is useful in gesture control and wearable electronics.

🧰 Components Required

Component	Quantity
Raspberry Pi 3	1
Flex Sensor	1
10KΩ Resistor	1
MCP3008 ADC	1
Breadboard & Jumper Wires	As required

⚡ Circuit Connections

Flex Sensor + MCP3008 + Raspberry Pi 3

MCP3008 Pin	Connect To
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)
CH0	Flex sensor voltage divider output

🧠 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:
        flex_value = read_channel(0)
        print("🤸 Flex Sensor Reading:", flex_value)
        time.sleep(0.5)

except KeyboardInterrupt:
    spi.close()

📊 Output

• Shows analog value corresponding to how much the sensor is bent.
• The more it bends, the higher the value.

💡 Applications

• Gesture recognition gloves
• Robotic hand control
• Wearable devices

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🎯 उद्दिष्ट

Flex Sensor चा वापर करून त्याचे वाकले जाणे वाचणे आणि MCP3008 ADC च्या मदतीने Raspberry Pi 3 वर वाचणे.

🧰 लागणारे साहित्य

घटक	संख्या
Raspberry Pi 3	1
Flex Sensor	1
10KΩ रेसिस्टर	1
MCP3008 ADC	1
ब्रेडबोर्ड आणि वायर	गरजेनुसार

⚡ सर्किट कनेक्शन

Flex Sensor + MCP3008 + Raspberry Pi 3

MCP3008 पिन	जोडणी
VDD & VREF	3.3V
AGND & DGND	GND
CLK	GPIO11
DOUT	GPIO9
DIN	GPIO10
CS/SHDN	GPIO8
CH0	Flex sensor चे output

🧠 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:
        flex_value = read_channel(0)
        print("🤸 Flex Sensor वाचन:", flex_value)
        time.sleep(0.5)

except KeyboardInterrupt:
    spi.close()

📊 आउटपुट

• Flex Sensor किती वाकला आहे त्यावर आधारित analog value दर्शवते.
• जास्त वाकले असेल तर value जास्त असते.

💡 उपयोग

• Gesture control gloves
• रोबोटिक हात नियंत्रणे
• विअरेबल उपकरणे