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Hw-416-b Pir Sensor Datasheet [best]

HW-416-B PIR Sensor Datasheet Write-up

Introduction

The HW-416-B is a passive infrared (PIR) sensor module designed to detect human presence and movement. PIR sensors are widely used in various applications, including security systems, smart home devices, and robotics. In this write-up, we will provide an overview of the HW-416-B PIR sensor, its features, specifications, and usage guidelines.

Features

  • High sensitivity: The HW-416-B PIR sensor is highly sensitive to human body radiation, allowing it to detect movement and presence with high accuracy.
  • Low power consumption: The sensor operates at a low voltage (2.7V to 5.5V) and consumes very low power (typically 60μA), making it suitable for battery-powered devices.
  • Adjustable sensitivity: The sensor's sensitivity can be adjusted using an onboard potentiometer, allowing for customization to suit specific application requirements.
  • Digital output: The HW-416-B provides a digital output signal, which can be easily interfaced with microcontrollers or other digital circuits.

Specifications

  • Operating voltage: 2.7V to 5.5V
  • Current consumption: 60μA (typical)
  • Detection range: 5-10 meters (adjustable)
  • Detection angle: 120° (horizontal)
  • Output signal: Digital (high/low)
  • Output delay time: 2-4 seconds (adjustable)
  • Operating temperature: -20°C to 80°C

Pinout and Interface

The HW-416-B PIR sensor has a simple 3-pin interface:

  • VCC: Power supply (2.7V to 5.5V)
  • GND: Ground
  • OUT: Digital output signal

Usage Guidelines

  1. Mounting: Mount the sensor in a stable and secure location, ideally with a clear line of sight to the area to be monitored.
  2. Sensitivity adjustment: Adjust the sensitivity using the onboard potentiometer to optimize detection performance for your specific application.
  3. Interfacing: Connect the sensor to a microcontroller or digital circuit, ensuring that the output signal is properly interfaced and processed.
  4. Power supply: Ensure a stable power supply within the recommended voltage range (2.7V to 5.5V).

Applications

The HW-416-B PIR sensor can be used in various applications, including:

  • Security systems: Intrusion detection, motion-activated alarms
  • Smart home devices: Automated lighting, temperature control
  • Robotics: Obstacle detection, motion tracking
  • Industrial automation: Presence detection, motion control

Conclusion

The HW-416-B PIR sensor is a reliable and versatile motion detection solution suitable for a wide range of applications. Its high sensitivity, low power consumption, and adjustable sensitivity make it an ideal choice for designers and engineers. By following the usage guidelines and specifications outlined in this write-up, you can effectively integrate the HW-416-B PIR sensor into your projects.

HW-416-B PIR Sensor Datasheet & Guide is a popular passive infrared (PIR) motion sensor module, commonly used in security systems, smart lighting, and DIY electronics projects . It is physically and functionally identical to the

module, making most tutorials and documentation for that sensor directly applicable to the Technical Specifications

The sensor operates by detecting infrared radiation emitted by the human body. Operating Voltage: 4.5V to 20V DC (5V recommended). Static Current: Output Signal: hw-416-b pir sensor datasheet

Digital TTL High (3.3V) when motion is detected; Low (0V) otherwise. Detection Range: 3 to 7 meters (adjustable via potentiometer). Detection Angle: Approximately 110° to 120°. Delay Time: 0.3 seconds to 5 minutes (adjustable via potentiometer). Operating Temperature: -20°C to +80°C. Pinout Configuration How PIR Sensor Works and How To Use It with Arduino

The HW-416-B: The "Always Watching" Sentinel for Your Projects

In the world of DIY electronics, few components offer as much "bang for your buck" as the Passive Infrared (PIR) sensor. The HW-416-B is a popular iteration of the classic HC-SR501 design, repackaged into a smaller, more breadboard-friendly form factor.

While it may look like a simple circuit board with a white dome, the HW-416-B is actually a sophisticated thermal radar. Let’s dive into the datasheet secrets that make this tiny sensor a powerhouse for home automation and security.

8. Important Notes & Limitations

  • Warm-up time: Needs 30–60 seconds after power-on to stabilize. Output may trigger randomly during this period.
  • No motion through glass/plastic: PIR cannot detect through solid barriers (glass, walls, etc.).
  • Temperature sensitivity: Performance degrades if ambient temperature is near human body temperature (35–37°C).
  • Avoid direct light: Sunlight or strong artificial light may cause false triggers.
  • Lens replacement: The white Fresnel lens is removable. Bare sensor (without lens) has ~90° cone but reduced range (~3m).

HW-416-B PIR Sensor Datasheet

Connecting to Arduino (5V logic)

| HW-416-B | Arduino Uno/Nano | | :--- | :--- | | VCC | 5V | | OUT | Digital Pin 2 (or any) | | GND | GND |

Simple Arduino Code Sketch:

int pirPin = 2;
int ledPin = 13;

void setup() 
Serial.begin(9600);
pinMode(pirPin, INPUT);
pinMode(ledPin, OUTPUT);



void loop() 
int motionState = digitalRead(pirPin); High sensitivity : The HW-416-B PIR sensor is


if (motionState == HIGH) 
digitalWrite(ledPin, HIGH);
Serial.println("Motion Detected!");
delay(100);
 else 
digitalWrite(ledPin, LOW);

Electrical Specifications (Absolute Maximum Ratings)

| Parameter | Min | Typical | Max | Unit | | :--- | :--- | :--- | :--- | :--- | | Supply Voltage (VCC) | 4.5 | 5.0 | 20 | V | | Output Current (sink/source) | – | 10 | 100 | mA | | Output Logic High | 2.4 | 3.3 | 3.5 | V | | Output Logic Low | 0 | 0.4 | – | V | | Standby Current | 20 | 45 | 60 | µA | | Warm-up Time (initial power-on) | – | 30 | 60 | sec |

Critical Note: Do not connect the output directly to a high-current load (e.g., a relay or LED strip). Use a transistor or an optocoupler for isolation.

6. Common Issues & Troubleshooting

| Problem | Likely Fix | |--------------------------|-------------| | Always HIGH output | Adjust sensitivity down; check for heat source (sun, heater) facing sensor | | Never triggers | Increase sensitivity; wait 15-30 sec after power-up for stabilization | | Triggers randomly | Disable “H” repeatable trigger; add a small capacitor (100nF) across VCC/GND | | Short detection range | Clean Fresnel lens; rotate sensitivity pot clockwise | | Output stays HIGH too long | Reduce time delay potentiometer (counter-clockwise) |

⚠️ Important: The sensor needs 10–60 seconds to calibrate after power-on. During this time, it may trigger falsely or stay LOW. This is normal.

Issue 3: Output stays HIGH forever

  • Cause: Continuous motion or stuck retrigger.
  • Fix: The HW-416-B has automatic retrigger; if any motion (including vibration) is present, it will reset the timer. Isolate the sensor from vibrations.