Hw-416-b Pir Sensor | Datasheet

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

A Passive Infrared (PIR) sensor measures infrared light radiating from objects in its field of view. The HW-416-B operates by detecting the thermal changes caused by moving human bodies or animals. It features a specialized Fresnel lens that focuses infrared radiation onto the internal pyroelectric sensor. 2. Technical Specifications Typical Value 4.5V to 20V DC Output Level High: 3.3V / Low: 0V Quiescent Current Approximately Detection Distance Up to 7 meters (adjustable via potentiometer) Detection Angle Delay Time 5s to 200s (adjustable) Blockade Time 2.5s (default) Trigger Method L (non-repeatable) / H (repeatable) Operating Temperature 3. Pin Configuration

The actual infrared detection is done by a pyroelectric sensor that responds to changes in infrared radiation. Because humans emit infrared at a wavelength of about 10 µm, the sensor is naturally sensitive to human movement. The white dome on top of the module is a . It divides the detection area into multiple zones and focuses the infrared energy onto the sensor, greatly increasing the detection range and angle. Without the Fresnel lens, the sensor would only “see” a narrow, short‑range window.

The HW-416-B features two potentiometers (yellow knobs) and one jumper for customizing behavior. 4.1 Sensitivity Adjustment (Potentiometer) hw-416-b pir sensor datasheet

The HW‑416‑B is a passive infrared motion sensor that detects movement by sensing changes in infrared radiation—primarily the heat emitted by humans and animals. When motion is detected, the module provides a digital HIGH signal on its output pin; when no motion is present, the pin stays LOW. This simple digital output makes it extremely easy to interface with microcontrollers such as Arduino, ESP8266, ESP32, and Raspberry Pi.

The HW-416-B is a PIR motion sensor designed to detect motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. Unlike active sensors, PIR sensors do not emit energy; they only "passively" receive infrared radiation.

Most cheap PIR sensors are designed to run on 5 V, and the HW‑416‑B is no exception. However, its internal electronics actually operate at 3 V, and the module includes a voltage regulator to handle a range of input voltages. void setup() Serial

The HW-416-B module features a standard (2.54mm pitch). The pin labeling is often printed on the back of the PCB.

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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. Because humans emit infrared at a wavelength of

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

+5V ──── VCC (Pin 1) │ [HW-416-B] │ OUT (Pin 2) ──── 10kΩ ──── Arduino Digital Input │ GND (Pin 3) ──── GND

Passive Infrared (PIR) sensors are the backbone of modern security systems, automated lighting, and smart home robotics. Among the various modules available to hobbyists and engineers, the stands out as a highly reliable, low-cost, and breadboard-friendly option for motion detection.

What are you planning to use (e.g., Arduino, ESP32, Raspberry Pi)?

What are you planning to use (ESP32, Raspberry Pi, etc.)?