Hw-416-b Pir Sensor Datasheet

The HW-416-B PIR sensor is a reliable, low-power motion detection module ideal for hobbyist and industrial prototypes. This article has provided a complete datasheet covering electrical specs, pinouts, potentiometer adjustments, trigger modes, and real-world wiring examples.

Whether you are building a security system, an automatic door, or a smart home sensor, understanding the HW-416-B’s configuration options ensures optimal performance. Bookmark this page as your go-to reference, and always remember to allow the 30-second warm-up period before testing.

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Need a printable version? Copy this article into a Word document, save as PDF, and you’ll have an unofficial but complete HW-416-B datasheet reference for your workshop.

Introduction

The HW-416-B is a passive infrared (PIR) sensor module commonly used in motion detection applications, such as security systems, lighting control, and robotics. In this post, we'll provide an overview of the HW-416-B PIR sensor datasheet, including its features, specifications, and usage guidelines.

Features

Specifications

Pinout and Connections

The HW-416-B PIR sensor module typically has three pins:

Usage Guidelines

Datasheet Resources

For more detailed information, you can download the HW-416-B PIR sensor datasheet from the following resources: hw-416-b pir sensor datasheet

Troubleshooting Tips

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 most interesting finding upon inspection is the controller chip. It is usually a "blob" of black epoxy (Chip-on-Board). Through reverse-engineering efforts by the open-source community, this chip has been identified as the BIS0001 (or BISS0001) generic infrared controller.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | No output | Warm-up period | Wait 60 seconds after power-on | | Always HIGH | SENS too high | Reduce SENS pot counter-clockwise | | Always LOW | Delay too short or SENS too low | Increase TIME or SENS pot | | False triggers | Vibration, RF noise, or heat sources | Mount securely; add 100nF cap across VCC/GND | | Short detection range | Lens dirty or SENS low | Clean lens; increase SENS |

Even with a datasheet, users face issues. Here are solutions specific to the HW-416-B:

| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | Sensor always HIGH | Power supply noise or shorted transistor | Use a regulated 5V supply; add 100µF capacitor across VCC/GND | | Sensor never triggers | Sensitivity too low or lens obstructed | Turn sensitivity pot clockwise; clean Fresnel lens | | Triggers randomly/too often | RF interference or heat source (AC vent, sunlight) | Reduce sensitivity; change mounting position | | No output after 30 min | Some modules enter power-save mode | Cycle power or configure for continuous trigger mode | | Output stays HIGH too long | Time delay set to maximum | Turn "TIME" pot fully counter-clockwise | The HW-416-B PIR sensor is a reliable, low-power

The HW-416-B does not "see" light like a camera. Instead, it detects radiation.

Every object with a temperature above absolute zero emits infrared radiation. Humans, being warm-blooded creatures, emit a very specific wavelength of infrared energy. The "magic" happens inside the white Fresnel lens dome. This lens acts as a collector, focusing the infrared energy onto the sensor's pyroelectric crystal.

When a warm body (like a person) moves across the sensor's field of view, the infrared level changes rapidly. The crystal generates an electrical charge in response to this change, triggering the alarm.

The Key Takeaway: The HW-416-B doesn't detect people; it detects change. This is why it ignores a static background but instantly notices motion.

Because of its small size (roughly 32mm x 24mm) and low power consumption, the HW-416-B is the go-to for: