HC-SR505 Mini PIR Motion Sensor Infrared Detector Module

Name: HC-SR505 Mini PIR Motion Sensor Infrared Detector Module
Brand: Generic
SKU: SENS-1960
Price: 77.00 INR
Availability: OutOfStock

₹77.00 (Inclusive of all taxes)

Out of Stock

The HC-SR505 is a compact, low-power PIR motion sensor module designed for automatic presence detection. Operating from 4.5V to 20V DC, it outputs a 3.3V high signal upon detecting motion within a 3-meter range, making it compatible with microcontrollers like Arduino, ESP32, and Raspberry Pi for security, lighting, and automation projects.

Features

Ultra-compact design measuring just 23mm x 10mm x 5mm for space-constrained applications.
Wide operating voltage range from 4.5V to 20V DC with a low quiescent current of ~60µA.
Repeatable trigger mode with a default delay time of approximately 8 seconds (±30%).
3.3V TTL-level output signal for direct interfacing with 3.3V/5V logic microcontrollers.
Broad detection cone angle of less than 100 degrees and a sensing distance up to 3 meters.

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Description

The HC-SR505 Mini PIR Motion Sensor utilizes a passive infrared (PIR) sensing element to detect movement by measuring changes in infrared radiation within its field of view. Its integrated circuitry handles signal conditioning and provides a clean, digital output pulse, simplifying integration into control systems. The module’s default repeatable trigger mode maintains a high output for the duration of detected activity, resetting the delay timer with each new motion event.

Constructed for reliability across a wide temperature range from -25°C to +85°C, this sensor is suited for both indoor and protected outdoor environments. Its minimal power draw and flexible voltage supply make it ideal for battery-powered or solar-operated automatic control products, from security systems to energy-saving lighting controls.

Key Features

High-sensitivity pyroelectric infrared (PIR) sensor with a 10mm Fresnel lens.
Low-power CMOS processing chip for stable performance and minimal current consumption.
Repeatable trigger mode (default) for continuous detection during active periods.
Wide DC input voltage compatibility, eliminating the need for a precise voltage regulator.
Compact, single-board module design with all components pre-soldered and calibrated.
Environmental durability with an operating temperature range of -25°C to +85°C.
Simple 3-pin interface (VCC, OUT, GND) for quick prototyping and system integration.

Applications

Battery-powered automatic lighting control and occupancy sensing for energy savings.
Intrusion detection and alarm triggering in DIY security systems and smart home setups.
Touchless activation for automatic doors, dispensers, and interactive toys.
Presence monitoring for industrial automation to control machinery or conveyor belts.
Wake-on-motion functionality for low-power IoT devices and wildlife cameras.

Technical Specifications

Model Number	HC-SR505
Operating Voltage	DC 4.5V - 20V
Quiescent Current	< 60 µA (Typical)
Output Signal	3.3V TTL High / 0V Low
Sensing Distance	Up to 3 meters
Detection Angle	< 100° (Cone Angle)
Default Delay Time	~8 Seconds (±30%)
Trigger Mode	Repeatable Trigger (Default)
Lens Diameter	10mm
Operating Temperature	-25°C to +85°C
Dimensions (L x W x H)	23 mm x 10 mm x 5 mm
Weight	Approx. 10 grams

Frequently Asked Questions

What is the output voltage level of the HC-SR505 sensor?

The HC-SR505 outputs a digital 3.3V TTL high signal when motion is detected and 0V when idle. This makes it directly compatible with 3.3V logic microcontrollers like ESP32 or Raspberry Pi. For 5V systems like most Arduinos, the 3.3V signal is generally safe to read as a HIGH input, but a simple voltage divider or level shifter can be used for guaranteed compatibility.

Can the delay time be adjusted on this PIR sensor?

The default delay time is fixed at approximately 8 seconds (±30%) and is not user-adjustable via onboard potentiometers like some larger PIR modules. The timing is controlled by the internal CMOS chip. For custom timing requirements, you would need to manage the output signal duration in your microcontroller code, ignoring the module's built-in delay, or source a variant specifically designed for adjustable delay.

How do I wire the HC-SR505 to an Arduino?

Connect the module's three pins: VCC to your power source (4.5V-20V, often 5V from Arduino), GND to common ground, and the OUT pin to a digital input pin on the Arduino (e.g., D2). Since the output is 3.3V, it is typically safe to connect directly to an Arduino's digital pin. Monitor the chosen pin; a reading of HIGH indicates detected motion. Ensure your code accounts for the sensor's built-in output delay.

What is the difference between non-repeatable and repeatable trigger mode?

The HC-SR505 is configured in repeatable trigger mode by default. In this mode, when motion is detected, the output goes high and starts a delay timer. If another motion is detected within that delay period, the timer resets, extending the high output. This ensures continuous activation during ongoing activity. A non-repeatable mode would output a high pulse for the fixed delay period regardless of subsequent motion, requiring motion to stop completely before a new trigger can occur.