Many sellers list HW-416-B as equivalent to HC-SR501, but there are subtle differences:
Conclusion: You can safely use an HC-SR501 datasheet as a reference for the HW-416-B, but the specifications provided in this article are more accurate for the "B" revision.
The workshop at the edge of town smelled of solder and lemon oil. Under a crooked lamp, Mira wiped a smudge from a tiny board labeled HW-416-B and held it up to the light. It was one of those everyday miracles: a compact PIR sensor module—unassuming, bronze pins like teeth, a plastic dome that hid a miniature world of circuits and possibility.
She remembered the datasheet she’d printed months ago and taped to her bench: pages of pinouts, timing charts, sensitivity adjustments, and electrical specs. Engineers called those pages dry; to Mira, they were a map. The HW-416-B, the sheet said, woke at a whisper—detecting motion by sensing the warm cadence of a human body crossing its field. Typical operating voltage: Vcc 3.3–5V. Quiescent current: a courteous microamp-level slumber until something moved. Output: digital, normally low, pulsing high when heat and motion passed its sightline. The module’s sensitivity could be tuned; a trim pot on the board let you coax it to notice a cat or ignore a tree swaying in wind.
She imagined the makers: someone soldering tiny resistors, testing detection angles, verifying hold times. The datasheet’s diagrams sketched the connector: Vcc, GND, OUT. A recommended application diagram suggested powering the HW-416-B from a microcontroller’s 3.3V rail and reading the OUT pin through a pull-down resistor. There were cautions too—don’t stare into the Fresnel lens with a laser, avoid prolonged exposure to humidity, and allow thirty seconds of stabilization when powering up; the sensor needed a moment of calm to learn the background temperature before it could tell friend from phantom.
Mira clipped the sensor into a prototype of a bedside lamp that would only light when someone entered the room after midnight. She soldered the Vcc and GND joints, ran a single wire from OUT to her microcontroller pin, and adjusted the sensitivity until the lamp ignored her sleeping cat but leapt to life when she walked by. Each test produced a tiny pulse on her logic analyzer: crisp, clean edges like a heartbeat. The datasheet’s timing diagram matched the pulses—an initial high for a few hundred milliseconds, then a retriggerable hold time as long as motion continued.
At midnight she tested again. The lamp obeyed: soft amber glow filling the room when she passed, conserving power the rest of the night. She smiled at the neatness of it—the way the datasheet’s sterile tables had translated into a living thing that answered a human need. The HW-416-B had become more than numbers; it was a small sentinel that watched over sleep and returned the favor with light.
Weeks later, a neighbor asked Mira for advice; he wanted a sensor for his porch that wouldn’t trigger every time a moth drifted by. She handed him the datasheet and the little board, showing him how the trim pot adjusted sensitivity, how adding a simple RC filter on the output could debounce spurious spikes, how angling the Fresnel lens slightly changed the detection zone. He left armed with both paper and practice—the datasheet as guide, the HW-416-B as tool.
On a rainy afternoon, she opened a new datasheet revision and noticed a minor update: a clarified recommended operating range and a tweak to the typical output waveform diagram. Small changes, but they mattered. She marked them in red and taped the page beside her original, a patchwork of knowledge that had guided a dozen small inventions.
The HW-416-B lived in many projects after that: a cupboard light that only came on when hands reached in, a hallway guardian that lit the way for sleepy feet, a garden alarm that stayed quiet until a fox crossed. Each time, the datasheet—a modest document of voltages, currents, and angles—was the seed from which a practical solution sprouted.
Mira liked that tech could be poetic in this way: specifications that read like constraints, which, when respected and understood, gave rise to unexpected convenience and quiet safety. The HW-416-B wasn’t a grand machine; it was a humble sensor with a simple promise and a datasheet that taught anyone patient enough how to keep that promise.
At dusk she powered up the lamp one last time, watching the sensor’s warm pulse feel across the room as she waved her hand. The LED obediently brightened, and for a moment the two of them—the maker and the module—were in a small, wordless conversation: numbers turned into function, specification into service. The datasheet lay on the bench, pages smoothed by use. It was, she thought, a little instruction manual for bringing still things to life.
The is a high-performance passive infrared (PIR) motion sensor module, frequently used as a direct, reliable replacement for the standard HC-SR501. It detects human and animal movement by sensing changes in infrared radiation emitted by warm objects. Core Specifications is electrically and physically identical to the Go to product viewer dialog for this item.
, offering tight component tolerances for stable performance in varying temperatures. Specification Operating Voltage 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 HW-416-B is a standard Passive Infrared (PIR) motion sensor module, frequently used in DIY electronics projects with microcontrollers like Arduino, Raspberry Pi, and ESP32. It is essentially a variant of the widely documented HC-SR501 module. Technical Specifications Operating Voltage: typically 4.5V4.5 cap V 12V12 cap V Output Signal: Digital HIGH ( 3.3V3.3 cap V ) when motion is detected; Digital LOW ( ) when idle. Detection Range: Adjustable up to meters (approx. Detection Angle: Approximately 110∘110 raised to the composed with power Quiescent Current: Extremely low, often less than Time Delay: Adjustable from approx. seconds to seconds via on-board potentiometer. Pinout and Connections
The module typically features three pins, usually marked on the PCB or under the white Fresnel lens: VCC: Power input ( is recommended for most applications). OUT: Digital output signal ( 3.3V3.3 cap V GND: Ground connection. On-Board Adjustments
The HW-416-B includes two orange potentiometers and a trigger jumper to fine-tune its behavior: Potentiometers
Sensitivity (Sx): Turning clockwise increases the detection distance.
Delay (Tx): Turning clockwise increases the "ON" time after motion is detected. Tip: Turn fully counter-clockwise for a short (~ second) delay, which is best for initial testing. Trigger Jumper
Single Trigger (L): Once motion is detected, the output stays HIGH for the set delay and then goes LOW, even if movement continues.
Repeatable Trigger (H): (Default) The output stays HIGH as long as motion is continuously detected, resetting the delay timer with each movement.
💡 Quick Pro-Tip: PIR sensors require a "warm-up" period of about 30 to 60 seconds after powering on to calibrate to the environment's infrared signature. During this time, you may get false triggers.
If you tell me which microcontroller you're using (like an Arduino Uno or Raspberry Pi), I can provide a specific wiring diagram and code snippet to get your sensor running. PIR Motion Sensor HW416B - Tayda Electronics
is a compact Passive Infrared (PIR) motion sensor module widely used in DIY electronics and security systems. It is essentially a variant of the popular , sharing a similar footprint and operation. Key Technical Specifications
detects motion by measuring changes in the infrared levels emitted by surrounding objects Operating Voltage: 4.5V to 20V DC. Voltage Output: High/Low signal (3.3V High, 0V Low). Detection Range: Adjustable up to approximately 7 meters (23 feet). Detection Angle: Less than 120°. Delay Time:
Adjustable (typically 5s to 200s or more depending on the specific potentiometer settings). Static Current: < 50µA, making it ideal for battery-powered projects. Pin Configuration
The module typically features three pins, which are often labeled on the board under the white Fresnel lens. Power input (Positive). Digital output signal (High when motion is detected). Ground (Negative). Adjustment Potentiometers
On the back of the module, you will usually find two orange potentiometers for manual calibration: Sensitivity (SENS):
Adjusts the detection distance. Turning clockwise generally increases the range. Time Delay (TIME):
Adjusts how long the output pin stays "High" after motion is detected. Operation Modes
modules include a jumper to switch between two trigger modes: Non-Repeatable Trigger (L):
The sensor output goes low once the delay time expires, even if motion continues. Repeatable Trigger (H):
The output remains high as long as motion is detected within the delay period.
For more detailed integration steps, you can explore guides from Instructables or technical documentation from snippet to test this sensor? Raspberry Pi Projects
While the specific model number HW-416-B 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.
Here is an interesting technical report summary based on reverse-engineering the HW-416/HC-SR501 hardware.
Based on behavior observed from multiple HW-416-B units:
Motion: |----| |----|
OUT: HIGH___________HIGH______LOW
|< 2.5s >| |< retriggered >|
Subject: Reverse Engineering the HW-416-B (HC-SR501) Control Logic. Component Focus: The unlabeled COB (Chip on Board) and adjustment potentiometers.
The HW-416-B is a passive infrared motion sensor module that detects changes in infrared radiation – primarily from moving people, animals, or warm objects.
Note: Some HW-416-B modules use an onboard 3.3V regulator, so the output pin is 3.3V – safe for 5V logic inputs (e.g., Arduino, STM32).
Many sellers list HW-416-B as equivalent to HC-SR501, but there are subtle differences:
Conclusion: You can safely use an HC-SR501 datasheet as a reference for the HW-416-B, but the specifications provided in this article are more accurate for the "B" revision.
The workshop at the edge of town smelled of solder and lemon oil. Under a crooked lamp, Mira wiped a smudge from a tiny board labeled HW-416-B and held it up to the light. It was one of those everyday miracles: a compact PIR sensor module—unassuming, bronze pins like teeth, a plastic dome that hid a miniature world of circuits and possibility.
She remembered the datasheet she’d printed months ago and taped to her bench: pages of pinouts, timing charts, sensitivity adjustments, and electrical specs. Engineers called those pages dry; to Mira, they were a map. The HW-416-B, the sheet said, woke at a whisper—detecting motion by sensing the warm cadence of a human body crossing its field. Typical operating voltage: Vcc 3.3–5V. Quiescent current: a courteous microamp-level slumber until something moved. Output: digital, normally low, pulsing high when heat and motion passed its sightline. The module’s sensitivity could be tuned; a trim pot on the board let you coax it to notice a cat or ignore a tree swaying in wind.
She imagined the makers: someone soldering tiny resistors, testing detection angles, verifying hold times. The datasheet’s diagrams sketched the connector: Vcc, GND, OUT. A recommended application diagram suggested powering the HW-416-B from a microcontroller’s 3.3V rail and reading the OUT pin through a pull-down resistor. There were cautions too—don’t stare into the Fresnel lens with a laser, avoid prolonged exposure to humidity, and allow thirty seconds of stabilization when powering up; the sensor needed a moment of calm to learn the background temperature before it could tell friend from phantom.
Mira clipped the sensor into a prototype of a bedside lamp that would only light when someone entered the room after midnight. She soldered the Vcc and GND joints, ran a single wire from OUT to her microcontroller pin, and adjusted the sensitivity until the lamp ignored her sleeping cat but leapt to life when she walked by. Each test produced a tiny pulse on her logic analyzer: crisp, clean edges like a heartbeat. The datasheet’s timing diagram matched the pulses—an initial high for a few hundred milliseconds, then a retriggerable hold time as long as motion continued.
At midnight she tested again. The lamp obeyed: soft amber glow filling the room when she passed, conserving power the rest of the night. She smiled at the neatness of it—the way the datasheet’s sterile tables had translated into a living thing that answered a human need. The HW-416-B had become more than numbers; it was a small sentinel that watched over sleep and returned the favor with light.
Weeks later, a neighbor asked Mira for advice; he wanted a sensor for his porch that wouldn’t trigger every time a moth drifted by. She handed him the datasheet and the little board, showing him how the trim pot adjusted sensitivity, how adding a simple RC filter on the output could debounce spurious spikes, how angling the Fresnel lens slightly changed the detection zone. He left armed with both paper and practice—the datasheet as guide, the HW-416-B as tool.
On a rainy afternoon, she opened a new datasheet revision and noticed a minor update: a clarified recommended operating range and a tweak to the typical output waveform diagram. Small changes, but they mattered. She marked them in red and taped the page beside her original, a patchwork of knowledge that had guided a dozen small inventions.
The HW-416-B lived in many projects after that: a cupboard light that only came on when hands reached in, a hallway guardian that lit the way for sleepy feet, a garden alarm that stayed quiet until a fox crossed. Each time, the datasheet—a modest document of voltages, currents, and angles—was the seed from which a practical solution sprouted.
Mira liked that tech could be poetic in this way: specifications that read like constraints, which, when respected and understood, gave rise to unexpected convenience and quiet safety. The HW-416-B wasn’t a grand machine; it was a humble sensor with a simple promise and a datasheet that taught anyone patient enough how to keep that promise. hw-416-b pir sensor datasheet
At dusk she powered up the lamp one last time, watching the sensor’s warm pulse feel across the room as she waved her hand. The LED obediently brightened, and for a moment the two of them—the maker and the module—were in a small, wordless conversation: numbers turned into function, specification into service. The datasheet lay on the bench, pages smoothed by use. It was, she thought, a little instruction manual for bringing still things to life.
The is a high-performance passive infrared (PIR) motion sensor module, frequently used as a direct, reliable replacement for the standard HC-SR501. It detects human and animal movement by sensing changes in infrared radiation emitted by warm objects. Core Specifications is electrically and physically identical to the Go to product viewer dialog for this item.
, offering tight component tolerances for stable performance in varying temperatures. Specification Operating Voltage 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 HW-416-B is a standard Passive Infrared (PIR) motion sensor module, frequently used in DIY electronics projects with microcontrollers like Arduino, Raspberry Pi, and ESP32. It is essentially a variant of the widely documented HC-SR501 module. Technical Specifications Operating Voltage: typically 4.5V4.5 cap V 12V12 cap V Output Signal: Digital HIGH ( 3.3V3.3 cap V ) when motion is detected; Digital LOW ( ) when idle. Detection Range: Adjustable up to meters (approx. Detection Angle: Approximately 110∘110 raised to the composed with power Quiescent Current: Extremely low, often less than Time Delay: Adjustable from approx. seconds to seconds via on-board potentiometer. Pinout and Connections
The module typically features three pins, usually marked on the PCB or under the white Fresnel lens: VCC: Power input ( is recommended for most applications). OUT: Digital output signal ( 3.3V3.3 cap V GND: Ground connection. On-Board Adjustments
The HW-416-B includes two orange potentiometers and a trigger jumper to fine-tune its behavior: Potentiometers
Sensitivity (Sx): Turning clockwise increases the detection distance.
Delay (Tx): Turning clockwise increases the "ON" time after motion is detected. Tip: Turn fully counter-clockwise for a short (~ second) delay, which is best for initial testing. Trigger Jumper
Single Trigger (L): Once motion is detected, the output stays HIGH for the set delay and then goes LOW, even if movement continues.
Repeatable Trigger (H): (Default) The output stays HIGH as long as motion is continuously detected, resetting the delay timer with each movement. Many sellers list HW-416-B as equivalent to HC-SR501,
💡 Quick Pro-Tip: PIR sensors require a "warm-up" period of about 30 to 60 seconds after powering on to calibrate to the environment's infrared signature. During this time, you may get false triggers.
If you tell me which microcontroller you're using (like an Arduino Uno or Raspberry Pi), I can provide a specific wiring diagram and code snippet to get your sensor running. PIR Motion Sensor HW416B - Tayda Electronics
is a compact Passive Infrared (PIR) motion sensor module widely used in DIY electronics and security systems. It is essentially a variant of the popular , sharing a similar footprint and operation. Key Technical Specifications
detects motion by measuring changes in the infrared levels emitted by surrounding objects Operating Voltage: 4.5V to 20V DC. Voltage Output: High/Low signal (3.3V High, 0V Low). Detection Range: Adjustable up to approximately 7 meters (23 feet). Detection Angle: Less than 120°. Delay Time:
Adjustable (typically 5s to 200s or more depending on the specific potentiometer settings). Static Current: < 50µA, making it ideal for battery-powered projects. Pin Configuration
The module typically features three pins, which are often labeled on the board under the white Fresnel lens. Power input (Positive). Digital output signal (High when motion is detected). Ground (Negative). Adjustment Potentiometers
On the back of the module, you will usually find two orange potentiometers for manual calibration: Sensitivity (SENS):
Adjusts the detection distance. Turning clockwise generally increases the range. Time Delay (TIME):
Adjusts how long the output pin stays "High" after motion is detected. Operation Modes
modules include a jumper to switch between two trigger modes: Non-Repeatable Trigger (L): Conclusion: You can safely use an HC-SR501 datasheet
The sensor output goes low once the delay time expires, even if motion continues. Repeatable Trigger (H):
The output remains high as long as motion is detected within the delay period.
For more detailed integration steps, you can explore guides from Instructables or technical documentation from snippet to test this sensor? Raspberry Pi Projects
While the specific model number HW-416-B 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.
Here is an interesting technical report summary based on reverse-engineering the HW-416/HC-SR501 hardware.
Based on behavior observed from multiple HW-416-B units:
Motion: |----| |----|
OUT: HIGH___________HIGH______LOW
|< 2.5s >| |< retriggered >|
Subject: Reverse Engineering the HW-416-B (HC-SR501) Control Logic. Component Focus: The unlabeled COB (Chip on Board) and adjustment potentiometers.
The HW-416-B is a passive infrared motion sensor module that detects changes in infrared radiation – primarily from moving people, animals, or warm objects.
Note: Some HW-416-B modules use an onboard 3.3V regulator, so the output pin is 3.3V – safe for 5V logic inputs (e.g., Arduino, STM32).
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