Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Frequency	24.125 GHz
Detection Range	Up to 8 meters
Beam Angle	Approx. 90 degrees
Supply Voltage	DC 3.3V - 5V
Current Consumption	< 20 mA
Output Signal	Analog voltage / Digital pulse
PCB Dimensions	24mm x 16mm x 2mm
Operating Temperature	-20°C to +70°C
Material	FR-4 PCB with ceramic antenna
Application	Automatic lighting, security alarms, smart home

6 reviews

Anonymous

Mar 28, 2026

Rating: 4/5

Good sensitivity, needs calibration

The sensor is very sensitive, which is great, but I had to tweak the gain resistor to stop false triggers from my ceiling fan. Once calibrated, it has been working flawlessly for my hallway lights.

Anonymous

Mar 24, 2026

Rating: 5/5

Great for student projects

We used these in our robotics club for obstacle avoidance and presence detection. They are robust and handle the 5V logic level easily with a simple comparator circuit. No issues so far.

Anonymous

Mar 21, 2026

Rating: 3/5

Works well but range varies

The module functions correctly, but I found the detection range drops significantly if there is metal nearby. Make sure to mount it away from large metal objects for best results.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect for my DIY security project

This HB100 module works exactly as described. The detection range is impressive for such a small component, and it picked up motion reliably through a thin plastic cover. Integration with my Arduino was straightforward.

Anonymous

Mar 06, 2026

Rating: 4/5

Compact and reliable

Small form factor makes it easy to hide in fixtures. The output signal is clean. Only giving 4 stars because the datasheet could be more detailed regarding the analog output scaling.

Anonymous

Mar 04, 2026

Rating: 5/5

Excellent value for money

I bought five of these for various prototypes. They are consistent in performance and the 24GHz frequency seems to penetrate materials better than the PIR sensors I used previously. Highly recommended.

5 FAQ

Q: Can this sensor detect motion through a wooden door?

A: Yes, microwave radar signals can penetrate non-metallic materials like wood, plastic, and glass. However, the effective range will be reduced depending on the thickness and density of the material.

Q: Can I power this directly from a 3.3V pin on an ESP32?

A: Yes, the operating voltage range is 3.3V to 5V, so it is fully compatible with 3.3V logic systems like the ESP32 or Raspberry Pi without needing a level shifter.

Q: What is the difference between the HB100 and standard PIR sensors?

A: Unlike PIR sensors that detect heat changes, the HB100 uses Doppler radar to detect movement via frequency shifts. This allows it to detect stationary micro-movements (like breathing) and work through non-metallic obstacles, whereas PIR requires a direct line of sight and significant temperature contrast.

Q: Is the output digital or analog?

A: The raw output is an analog voltage proportional to the detected motion strength. Many users add a simple comparator circuit (like an LM393) to convert this into a clean digital HIGH/LOW signal for microcontrollers.

Q: Does this module come with a lens or housing?

A: No, this is a bare PCB module intended for integration into custom enclosures or products. You will need to design or source your own housing and lens if required for your specific application.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Ultrasonic Sensor HC-SR04 Ultrasonic Distance Measuring Module Bracket US015-025-026-100

$3.16

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

3-Wire/4-Wire Flame Sensor Module, Fire Source Detection with IR Receiver, Flame Detection and Alarm

$1.08

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Digital 38KHz Infrared Receiver Transmitter Head Sensor Module Electronic Building Blocks Robot Infrared Communication Remote Control

$2.29

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

HX711 Pressure Sensor Module Electronic Scale Bracket Weighing DIY Scale Pan Tray Set 5/10/40kg200

$3.28

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

Thin Film Pressure Sensor Display, USB Rechargeable Flexible Resistive Pressure Digital Display Module, Wide Range Wireless

$20.00

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

5A Range Current Transformer Module Voltage Sensor Single-Phase AC Active Output Current Transmitter

$5.06

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

AHT10 High-Precision Digital Temperature and Humidity Sensor Measurement Module I2C Communication Replaces sht20

$7.88

Digital 38KHz Infrared Receiver/Transmitter Head Sensor Module for Electronic Building Blocks Robots, Infrared Communication Remote Control

$2.80

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

MPU-9255 9-Axis Attitude 3-Axis Electronic Compass Accelerometer Gyroscope Magnetic Field Sensor Module

$13.42

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Ningbo Keli SQB Cantilever Beam Weighing Module Sensor 100kg 500kg 1t 2t 3 Ton Small Floor Scale Inductor

$48.00