The HC-SR501 is a low-cost passive infrared (PIR) motion sensor module that detects movement by sensing changes in infrared radiation emitted by warm bodies, such as humans and animals, passing within its field of view. By comparing infrared levels over time, it can provide a simple digital HIGH/LOW output whenever motion is detected. This makes … Read more
The GP2Y1010AU0F is a compact optical dust sensor manufactured by Sharp that combines an infrared emitting diode and a phototransistor in a single plastic housing. By detecting the intensity of light scattered by airborne particles, it can provide a real-time analog voltage output proportional to dust concentration in the surrounding air. This makes the GP2Y1010AU0F … Read more
The MPU9250 is a 9-axis inertial measurement unit (IMU) that combines a 3-axis gyroscope, a 3-axis accelerometer, and a 3-axis magnetometer in a single compact package. By measuring rotational movement, acceleration, and magnetic field direction, it can provide accurate motion tracking, orientation sensing, and heading information. This makes the MPU9250 ideal for applications that require … Read more
The PMS5003 is a digital particulate matter sensor that uses laser scattering technology to measure the concentration of airborne particles in three size categories: PM1.0, PM2.5, and PM10. It provides calibrated mass concentration data as well as raw particle counts through a UART interface, making it easy to integrate with microcontrollers and single-board computers. The … Read more
The MQ5 is an analog gas sensor designed to detect flammable gases such as LPG, natural gas, and town gas by measuring changes in the resistance of a heated sensing element. It provides both an analog output proportional to gas concentration and a digital output that can be triggered at a user-defined threshold. The sensor … Read more
The MPU6050 is a 6-axis inertial measurement unit (IMU) that combines a 3-axis gyroscope and a 3-axis accelerometer in a single compact chip. It is widely used in drones, self-balancing robots, motion-tracking systems, gaming controllers, and gesture-recognition devices. By measuring both acceleration and rotational movement, the MPU6050 can determine an object’s orientation, tilt, and motion … Read more
The MQ135 is an analog air quality sensor by Winsen Electronics that detects a broad range of toxic and pollutant gases by measuring resistance changes across a heated tin dioxide element. Unlike the rest of the MQ series (which each target one or two specific gases), the MQ135 is designed as a general-purpose air quality … Read more
The MQ7 is an analog carbon monoxide (CO) gas sensor that detects the presence of carbon monoxide in the air by measuring changes in electrical resistance. Carbon monoxide is a colorless, odorless, and highly toxic gas produced by the incomplete combustion of fuels such as gasoline, natural gas, coal, and wood, making it impossible to … Read more
The MQ3 is an analog alcohol gas sensor that detects ethanol vapour in the air by measuring changes in electrical resistance across a heated tin dioxide sensing element. It provides both an analog voltage output proportional to alcohol concentration and a digital threshold output, making it easy to interface with microcontrollers. The sensor is commonly … Read more
The BME688 is a compact, digital 4-in-1 environmental sensor that measures gas, humidity, pressure, and temperature in a single package — purpose-built for mobile and connected devices where size and energy efficiency are non-negotiable. Its gas sensing capability is particularly noteworthy — it can detect volatile organic compounds (VOCs), volatile sulfur compounds (VSCs), carbon monoxide, … Read more