Every object with a temperature above absolute zero emits infrared radiation. The HW-416-B contains a pyroelectric sensor split into two halves.
The HW-416-B operates on the principle of pyroelectricity. It features a specialized infrared-sensitive crystal covered by a multi-segmented Fresnel lens to maximize its detection field. Core Specifications DC 4.5V to 20V (Commonly powered via 5V) Static Current Consumption: Less than 60µA hw-416-b pir sensor datasheet
Search for "HW-416-B schematic PDF" on sites like LCSC or Alldatasheet. Many electronics resellers provide compiled datasheets for generic modules under the "HW" series. Every object with a temperature above absolute zero
int ledPin = 13; // Onboard LED (optional) int inputPin = 2; // PIR sensor output pin int pirState = LOW; // Start assuming no motion int val = 0; // Variable for reading pin status int ledPin = 13; // Onboard LED (optional)
For more detailed information, you can download the HW-416-B PIR sensor datasheet from the following resources:
| Feature | HW-416-B | HC-SR501 | |------------------|------------------|------------------| | Core chip | BIS0001 (or clone) | BIS0001 | | Voltage range | 4.5–20V | 5–20V | | Trigger modes | L / H jumper | L / H jumper | | Output voltage | 3.3V | 3.3V | | Availability | Lower cost, generic | Widely used |