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KY-036 Metal Touch Sensor

KY-036 Metal Touch Sensor

₹44.00Price
🔩 KY-036 Metal Touch Sensor
Touch Detection • Simple Switch • Arduino Compatible
📌 What is KY-036?
The KY-036 is a metal touch (human body touch) sensor module that detects when a conductive object (like a finger or metal) touches its sensing surface.
👉 It acts like a touch-based switch
👉 Common in Arduino sensor kits
✔ Used for simple human-machine interaction systems
⚙️ Working Principle
  • The module uses a transistor-based detection circuit
  • When a finger touches the metal pad:
    • Electrical conductivity changes
    • Signal is amplified and detected
✔ The module outputs a signal based on this change
🧠 Internal Components
  • LM393 comparator IC
  • Transistor sensing circuit
  • Potentiometer (for sensitivity adjustment)
  • Indicator LEDs
🔌 Pin Configuration
Typical 4 pins:
  • VCC → 3.3V – 5V
  • GND → Ground
  • DO → Digital Output
  • AO → Analog Output
✔ Can be used with both digital and analog signals
🔄 Output Behavior
  • No touch → default state (HIGH or LOW depending on module)
  • Touch detected → output changes state
✔ Digital output works like a button switch
✔ Analog output gives touch intensity level
📊 Technical Specifications
  • Operating Voltage: 3.3V – 5.5V
  • Typical Voltage: 5V
  • Current Consumption: ~10 mA
  • Output Type: Analog + Digital
  • Sensitivity: Adjustable via potentiometer
  • Signal Channel: Single-channel output
✨ Key Features
  • Detects human touch or metal contact
  • Adjustable sensitivity
  • Digital + analog outputs
  • Onboard LED indicators
  • Low cost and easy to use
  • Compatible with Arduino, ESP8266, ESP32
🛠️ Applications
  • Touch-controlled switches
  • Security alarm triggers
  • Interactive projects
  • DIY touch buttons
  • Human-machine interfaces
⚡ Advantages
  • Simple design and easy interface
  • Low power consumption
  • Works as a contactless button alternative
  • Adjustable sensitivity
⚠️ Limitations
  • Sensitive to electrical noise
  • Can give false triggers in humid environments
  • Not as stable as capacitive touch sensors
  • Requires calibration for best performance
💡 Important Notes
  • Works best when touched directly
  • Sensitivity must be adjusted properly
  • Avoid long wires (can cause noise issues)
  • Not suitable for precise touch measurement
🧾 Summary
The KY-036 Metal Touch Sensor is a basic touch detection module that:
✔ Detects contact using conductivity
✔ Outputs digital/analog signals
✔ Works like a simple touch switch
👉 Ideal for beginner Arduino projects and simple automation systems
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