Pir Sensor Datasheet //free\\ — Hw-416-b

Comprehensive Guide to the HW-416-B PIR Motion Sensor The is a compact, highly efficient Passive Infrared (PIR) sensor module widely used in DIY electronics, security systems, and automated lighting projects . Often categorized alongside the popular HC-SR501, the HW-416-B is favored for its smaller footprint and reliable performance in detecting human or animal movement.

GPIO.setmode(GPIO.BCM) GPIO.setup(PIR_PIN, GPIO.IN)

When a human walks past, they pass the first slot, causing a positive differential change. As they continue walking, they pass the second slot, causing a negative differential change.

When you first apply power to the HW-416-B, it requires a initialization/warm-up phase lasting anywhere from . During this time, the sensor samples the ambient infrared signature of the room to establish its baseline. The output pin may trigger randomly during this phase, which is normal. Your code should account for this behavior by implementing a delay before listening for active interrupts. 6. Applications and Troubleshooting Common Implementations

Flip the module over to locate two small, adjustable potentiometers: hw-416-b pir sensor datasheet

If you hold the board with the white dome (Fresnel lens) facing up and look at the pin header from the side, the pinout is generally structured as follows (always verify with the silkscreen markings on your specific board revision):

If your HW-416-B is outputting false positive triggers, consider the following variables:

, offering tight component tolerances for stable performance in varying temperatures. Specification DC 4.5V – 20V Static Current Output Level 3.3V (High) / 0V (Low) Detection Range Adjustable from 3m to 7m Detection Angle < 120° cone angle Delay Time Adjustable (approx. 0.3s to 5 minutes) Operating Temp -20°C to +80°C Pinout & Wiring HC-SR501 PIR MOTION DETECTOR

The sensor needs about 30 to 60 seconds to "learn" the infrared signature of the room after powering on. Expect false triggers during this time. Comprehensive Guide to the HW-416-B PIR Motion Sensor

Most HW-416-B variants include a three-pin jumper header labeled and L to select the trigger mode:

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Looking directly at the back of the PCB board (with the pins facing downward), the layout is typically configured as follows: As they continue walking, they pass the second

If you are looking for a standard PDF datasheet for the HW-416-B, you likely won't find one from a major manufacturer. These sensors are generic modules produced by various Chinese factories.

The module typically features three pins, usually marked on the PCB or under the white Fresnel lens: Power input ( is recommended for most applications). OUT: Digital output signal ( 3.3V3.3 cap V GND: Ground connection. On-Board Adjustments

Approximately 32mm x 24mm (Standard compact footprint) 3. Pinout and Hardware Overview

The HW-416-B module detects human or animal motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. It features on-board signal processing, adjustable sensitivity, and variable delay timing. Technical Parameters DC 4.5V to 20V (commonly powered at 5V) Static Current: < 60 µA Voltage Output: High 3.3V / Low 0V Detection Angle: < 100-degree cone angle

/* HW-416-B PIR Motion Sensor Integration Demonstrates how to read a digital signal from the HW-416-B module. */ const int PIR_PIN = 2; // HW-416-B OUT pin connected to digital pin 2 const int LED_PIN = 13; // Built-in Arduino LED int pirState = LOW; // Start assuming no motion detected int val = 0; // Variable for reading the pin status void setup() pinMode(PIR_PIN, INPUT); // Declare sensor as input pinMode(LED_PIN, OUTPUT); // Declare LED as output Serial.begin(9600); Serial.println("Initializing PIR Sensor... Please wait for warmup."); // Give the sensor 30-60 seconds to warm up and calibrate to the environment delay(30000); Serial.println("Sensor active."); void loop() val = digitalRead(PIR_PIN); // Read input value if (val == HIGH) // Check if the input is HIGH digitalWrite(LED_PIN, HIGH); // Turn LED ON if (pirState == LOW) // Motion just detected Serial.println("=> Motion detected! Object moving within zone."); pirState = HIGH; else digitalWrite(LED_PIN, LOW); // Turn LED OFF if (pirState == HIGH) // Motion just ended Serial.println("=> Motion ended. Area clear."); pirState = LOW; Use code with caution. Warm-up Period Warning