Your HW416B is no longer a mysterious black box with two pots and a jumper. It is a finely tunable, low-power, reliable motion sensor. Now go build something that reacts exactly when you want it to – and nothing less.
While a unified "hw416b pir sensor datasheet better" document may not exist, the core information is clear and consistent. The HW416B (a member of the HC-SR501 family) is a versatile, easy-to-use motion sensor. By understanding its pinout, adjusting its two potentiometers, selecting the correct trigger mode, and factoring in its critical 60-second warm-up time, you can successfully use this module in a vast array of Arduino and ESP8266-based projects.
#define PIR_PIN 2 // Connect PIR OUT to digital pin 2 #define LED_PIN 13 // Built-in LED for visual indication
| Feature | HW416B | HC‑SR501 | |---------|--------|----------| | | Yes (potentiometer) | Yes (potentiometer) | | Adjustable sensitivity | Yes (potentiometer) | Yes (potentiometer) | | 3.3 V operation | Via configuration pins (verified) | Requires regulator bypass | | Trigger mode jumper | Yes (repeat/non‑repeat) | Yes | | EMC certification | Listed in product specs | Not typically claimed | | Price | Similar (~US$3–5) | Slightly cheaper (~US$2–4) |
Why? Because the HW-416B is functionally a clone of the classic . However, the HW-416B has specific quirks regarding voltage and timing. After benching three different batches, here is the better datasheet you actually need. hw416b pir sensor datasheet better
const int PIRpin = 2; int pirState = LOW; int val = 0;
Operates well with 5V or 3.3V logic systems. 2. HW416B PIR Sensor Datasheet & Technical Specifications
is valued for its consistent quality control and stability under varying environmental conditions How PIR Sensor Works and How To Use It with Arduino
The first point of confusion is the naming itself. You will often find these names used interchangeably by retailers, hobbyists, and in forums. A search for "hw416b pir sensor datasheet better" will lead you to pages for the "HC-SR501," confirming their functional equivalence. Your HW416B is no longer a mysterious black
This technical guide serves as a comprehensive datasheet, complete with optimization strategies to configure your HW-416B sensor for optimal performance. Master Technical Specifications Table
Have you found a different revision of the HW416B? Share your measured quiescent current or detection angle in the comments below. Together, we’ll build the world’s most accurate, community-driven HW416B reference.
Adjustable from 3 to 7 meters using an onboard potentiometer. Detection Angle: Approximately 100° to 120° cone angle.
A datasheet is useless if it doesn't prevent failure. Here’s how to get performance than the average user. While a unified "hw416b pir sensor datasheet better"
void loop() if (motionDetected) digitalWrite(LED_PIN, HIGH); Serial.println("Motion detected!"); motionDetected = false; lastMotionTime = millis();
The two extra pins (sometimes referred to as “configuration pins”) can be used to change the module’s operating mode. Connecting a jumper between them alters the trigger behaviour (repeat/non‑repeat). When powered at 3.3 V, the correct pin to use is the one shown in Figure 3 of many HW‑416 tutorials—not the other unlabelled pins.
There are two small, blue, square potentiometers on the board. They are your primary tools for tailoring the sensor's behavior.
These specifications come from general PIR sensor data applicable to the HW-416B module.