RGB LCD Display Electromyography using Arduino + MyoWare Muscle Sensor

Measuring muscle activity that uses electric potential as an indication to know the health, and diagnose muscles to its present status is referred to as electromyography (EMG). Electromyography also assesses the condition of nerve cell (also called as motor neurons) that controls the muscles and can detect neuromuscular disorders. The reference design is a LCD display electromyography using arduino plus myoware muscle sensor from Adafruit. The reference design features the standard LCD 181 also from Adafruit Industries LLC with the use of I2C/SPI character LCD backpack. The design also uses the muscle sensor surface EMG electrodes. Read more

PM2.5/PM10 Particle Sensor for Air Quality Monitoring

Air pollution is one major problem that every individual is at risk. The pollutant, that contributes to these increases as industrialization and technology upgrade. Particulate matter or “PM” is the term being given to such particles like smoke, dust, dirt, and soot, which can be found in the air. The particulate matters can be dangerous depending on concentration and sizes. The sizes which considered can cause health risk are PM10 and PM2.5, which among the said particulate matter, PM2.5 (approximately 1/30th the average width of a human hair) is the most harmful PM for the reason that it can penetrate and lodge deeply to the lungs. The PM2.5/PM10 particle sensor for air quality monitoring reference design is an analog-front-end design, which can measure the particle concentration and sizes in the air. The design uses INA132, a low power single supply differential amplifier consisting a precision op-amp with a precision resistor network. It comes also with OPA2320 and OPA320, which is a new family of low-voltage CMOS op-amp that features a linear input stage with zero-crossover distortions that delivers excellent common mode rejection ratio (CMRR) of typically 114dB over the full input range. Read more

IO-Link Device Transceiver

The IO-Link is a compliant of International Electrotechnical Commission (IEC 61131-9) standard. It is the standard for single-drop digital communication interface for small sensors and actuators. Furthermore, IO-link is a 24-V communications interface that allows smart sensors and actuators to exchange advanced configuration, status and diagnostics information using a powerful, yet simple protocol. It specifies point-to-point communication over a maximum distance of 20m using standard M5/M8/M12 connectors and 3/4/5 wire cables. The IO-Link masters provide communication over standard fieldbuses, such as Ethernet, RS485, etc., with any IO-Link device (smart sensor or actuator). Each master port provides both power and data over a single cable to each device. Read more

Battery Fuel Gauge

This reference design is a typical application for the bq28z610 Battery Fuel Gauge device. It is a 1 to 2 series Li-Ion/Li Polymer battery pack and protection solution, enabling independent charger control and cell balancing. The device provides a fully integrated pack-based solution with a flash programmable custom Reduced Instruction-Set CPU (RISC), safety protection, and authentication for 1- to 2-series cell Li-Ion and Li-Polymer battery packs. It also measures cell voltage and current simultaneously, and also measures temperature to calculate the information related to remaining capacity, full charge capacity, state-of-health, and other gauging parameters. Read more

Ultra-low Power Multi-sensor Data Logger with NFC Interface

The cold chain monitoring is the process of ensuring a certain product temperature to remain constant upon shipping and distribution. The ultra-low power multi-sensor data logger with NFC interface reference design integrates multiple sensors for cold chain monitoring. The board features wireless communication through RF430CL330H dynamic near field communication (NFC) interface transponder. The TMP112 device is a digital temperature sensor ideal for NTC/PTC replacement and has an accuracy of ±0.5°C. The OPT3001 is an ambient light sensor that measures the intensity of visible light. For humidity measurement, the HDC1000 is a digital humidity sensor with integrated temperature sensor. The board also comes with MSP430 mixed-signal microcontroller. Read more

T8031 Carbon Dioxide Duct-Mount Transmitter

The T8031 device is one of the smallest duct-mount carbon dioxide transmitters on the market. It can be powered by an AC power supply (18-30VAC RMS 50/60Hz) or a DC power supply (18-42VDC). The device outputs a standard 0-10VDC with respect to the factory calibrated measurement range (0-2000ppm) of the sensor. It has an accuracy of +/-40ppm plus 3 percent of the reading when temperature is 22 degree Celsius. The operating temperature of T8031 should fall between 0 and 50 degree Celsius. The duct air velocity should be also around 0 to 7.5 meters per second. The power consumption of T8031 transmitter is 1.65W peak or 0.65W average. Read more

TMP107 Digital Temperature Sensor

Traditionally, thermistors are used as temperature-sensing element in some applications. Nowadays, digital temperature sensors are widely used and eventually have replaced thermistors due to its high accuracy. This reference design uses TMP107 digital output temperature sensor that supports a total of 32 daisy-chained devices. Each sensor has a unique 5-bit address stored in electrically erasable programmable memory (EEPROM). The TMP107 is capable of reading temperatures with a resolution of 0.015625°C, and is accurate to within ±0.4°C in the range from –20°C to +70°C. Read more

Mobile Phone SiSonic Microphone Interface

The mobile phone is one of the most electronic device today. It continue to be developed that some of them are build with sophistication. However, the major purpose of the device stay the same, it is to communicate to other people that has the device. In the communication, the device uses a microphone as the receiver of the voice information or any sound information. In this design, it features a SiSonic microphone that has high Signal-to-Noise Ratio(SNR) while maintaining matched sensitivity. It is in a small package with omnidirectional and flat frequency response features that can be integrated to different applications.

Open Loop Magnetic Field Sensing Evaluation Module

A magnetic field sensor is an electromechanical device that is used for detecting and measuring magnetic fields. This device is designed for single-axis magnetic field-sensing applications. It enables electrically isolated, high-sensitivity, and precise DC and AC field measurements. The fluxgate sensors offer significantly higher sensitivity, lower drift, lower noise, and high linearity and enables up to 1000-times better accuracy of the measurement. This device provides an integrated fluxgate sensor (IFG) with an internal compensation coil to support a high-accuracy sensing range of ±2mT with a measurement bandwidth of up to 47kHz. Read More

Motion Tracking Module

This circuit is designed to evaluate the FTM1030 motion-tracking module. It has a pre-mounted FMT1030 Attitude and Heading Reference System (AHRS) and comes with the extensive MT Software Suite and USB-cabling. The FMT1030 module includes accelerometers, gyroscopes, magnetometers, 10ppm crystal, and a dedicated MCU with onboard pitch, roll, and yaw solutions.

Centralize Light Switch using QTouch

The lighting control of modern building is now into touch panel. It provides convenience to lighting control because it becomes more compact unlike the typical 2-way switch. In this design, it features single-key QTouch touch sensor IC that have one-configurable as either a single key or a proximity sensor. Since the key outline different sizes and shapes, several combinations are possible. It is settable as toggle switch or momentary switch while the signal processing is self-calibration, auto drift compensation, and noise filtering. Read more

MCP9600 Thermocouple EMF to Temperature Converter

A thermocouple is a device that acts as a temperature to voltage transducer. In this circuit, a type K thermocouple is inserted at the input side of the type K thermocouple adapter or connector, PCC-SMP-K-100. This design can be used in different applications such as industrial equipment thermal management, ovens, industrial engine thermal monitor, temperature detection racks, etc.