Hw-416-b Pir Sensor Datasheet < Popular · Edition >

The module exposes three interface pins, typically clearly labeled on the bottom silk-screen of the PCB: Input power supply (4.5V – 20V DC).

int pirState = LOW; int val = 0;

The 3.3V HIGH signal is standard for PIR chips (like the BISS0001 frequently utilized on these modules). This is perfectly adequate to trigger a 5V Arduino digital pin, which registers any voltage above 3.0V as a logic HIGH. hw-416-b pir sensor datasheet

Inside the HW-416-B's metallic canister are two separate pyroelectric sensor slots connected in a differential configuration.

The sensor outputs HIGH when motion is detected. If target movement continues within the detection zone during the delay period, the timer resets, and the output stays HIGH until the target leaves. 4. How the HW-416-B Works The module exposes three interface pins, typically clearly

The HW-416-B uses a simple three-pin interface (VCC, OUT, GND), but also features a four-pin configuration header that allows advanced options.

+5V ──── VCC (Pin 1) │ [HW-416-B] │ OUT (Pin 2) ──── 10kΩ ──── Arduino Digital Input │ GND (Pin 3) ──── GND Inside the HW-416-B's metallic canister are two separate

Built-in potentiometers allow fine-tuning of delay time and sensing distance.

While the specific model number appears to be a variance or specific batch code of the standard HC-SR501 PIR sensor (commonly found in Arduino starter kits), the "interesting report" regarding this device isn't a standard datasheet. Instead, the most compelling technical analysis focuses on the incredible complexity hidden inside a cheap sensor and the common myths about its potentiometers .