Category Archives: Sensors

Cellphone Detector

*Introduction*With the advancement in communication technology, cell phones now are the most common electronic equipment. It transmits and receives signals in the frequency range of 0.9GHz to 3GHz. The circuit below detect the presence of an activated cell phone when it detects these signals. The principle behind the project is the idea of using the…

BMA222 Digital triaxial acceleration sensor

The BMA222 is an advanced, ultra-small, triaxial, low-g acceleration sensor with digital interfaces, aiming for low-power consumer electronics applications. The BMA222 allows measurement of accelerations in 3 perpendicular axes and thus senses tilt, motion, shock and vibration in cellular phones, handhelds, computer peripherals, man-machine interfaces, virtual reality features and game controllers.   Figure:1 Schematic Diagram…

Motion Sensing & LED Control Design

Project Summary The Motion Sensing & LED Control Reference Design demonstrates how to use Zilog's Z8FS040 ZMOTION MCU with the IXYS LDS8710 high-efficiency LED driver and explains how to implement features such as ambient light detection and LED dimming in addition to passive infrared motion detection. It also illustrates how the combined capabilities of both…

Bio-Sense uses with Biosensors

A biosensor is an analytical device that converts a biological response into an electrical signal. The term biosensor is often used for sensor devices used to determine the concentration of substances and other parameters of biological interest even where these do not utilise a biological system directly. With an estimated 60 per cent annual growth…

Handheld Electronic Compass Applications Using a MEMS Tri-Axis Accelerometer

                              This application note explains the integration of a Kionix MEMS tri-axis accelerometer into a handheld electronic compass application. Required theory, plots, equations and circuit block diagrams are provided with this note as guidelines. The earth’s magnetic field is approximately 0.6…

Designing a Concentrator for High-Current Sensing Applications

Guidelines for Designing a Concentrator for High-Current Sensing Applications with an Allegro Hall-Effect Sensor IC By Cedric Gillet and Andreas Friedrich As with any semiconductor device, the integrated current sensing solutions that Allegro™ offers can be limited in the maximum allowable current and isolation voltage they can tolerate. Energy dissipation and package dimensions are the…

Managing External Magnetic Field Interference When Using ACS71x Current Sensor ICs

Managing External Magnetic Field Interference When Using ACS71x Current Sensor ICs By Richard Dickinson and William Bentley Abstract The highly compact Hall effect current sensor ICs without concentrators that are now available make it possible to enhance performance of small-current differentiation by simple layout steps and shielding the device from extraneous magnetic flux along its…

High Efficiency Current Sensing Hall Sensor IC

New Approaches to High-Efficiency Current Sensing: Integrated Hall Sensor ICs Save Power and Space. Recent advancements in integrated Hall-effect current sensor technology provide an alternative current sensing solution that reduces power loss, achieves most cost targets, and occupies a much smaller volume on the application printed circuit board. Current Sensing with a Sense Resistor and…