Sensor category

AS7261 Color sensor from Ams

The AS7261 integrates Gaussian interference filter technology to enable chromatic white color sensor which provides direct XYZ color coordinates consistent with the CIE 1931 2° Standard Observer color coordinates. Additional mapping of XYZ coordinates to the x, y (Y) of the 2-dimensional color gamut and scales of the CIE 1976 u’v’ coordinate system, providing accurate Correlated Color Temperature (CCT) measurements and color point deviation from the black body curve for white light color in the ∆u’v’ coordinate system. A Near-IR channel and LED drivers with programmable currents increase application flexibility, including support for electronic shutter applications.

AS7261 Color sensor from Ams – [Link]

Accelerometers for vibration measurements & wireless condition monitoring

Graham Prophet @ eedesignnewseurope.com discuss about two new MEMS accelerometers from Analog Devices:

Analog Devices (ADI) has added two devices to its low noise, low drift, low power, three-axis MEMS accelerometers. The low noise performance over high frequencies provided by the ADXL356 and ADXL357 MEMS accelerometers delivers high resolution vibration measurements that enable the early detection of machine failure in condition monitoring applications.

Accelerometers for vibration measurements & wireless condition monitoring – [Link]

Explore magnetoresistive sensing with Arduino

Graham Prophet@ eedesignnewseurope.com discuss about precision-measurement motion sensing using Arduino compatible kit.

From distributor RS Components, this kit enables development of precision-measurement motion control systems using Sensitec’s magnetoresistive sensor technology, applied to linear and angular measurement.

Explore magnetoresistive sensing with Arduino – [Link]

Add WiFi & Bluetooth Easily With Koala® Connect Modules

Clarinox Technologies Pty Ltd was formed with the aim of providing cost effective and innovative wireless embedded systems solutions to business. Due to the experience of the Clarinox team, more embedded systems are designed to develop leading edge solutions. In addition to delivering flexible and robust wireless protocol software for embedded systems developments.

Clarinox hottest products are Koala® Connect Modules! A compact option for adding Wi-Fi® and / or Bluetooth® to new and existing projects.

These modules will give you a stable environment while used with Koala® EVM, the first and only development board to support development for all major wireless technologies. It enables embedded systems developers to create both low and high power wireless systems communicating over Wi-Fi, Bluetooth Classic and Bluetooth Low Energy. It provides a fast and cost effective way to commence embedded wireless development with all major wireless technologies.

Each module features a single onboard processor to drive the user application in addition to multiple wireless protocols. The modules available are:

Koala® Connect Modules
KM-141201 (20 x 30mm BT/BLE)
KM-153101 (20 x 34mm Wi-Fi+BT/BLE)

Carrier Board for Koala® Connect
KC-018102

Sensor Modules
KM-990501 Sensor Board

The Koala EVM and wireless module family will help shorten development time, reduce development costs, and open the door to new possibilities for wireless device features.

And these are the specifications

Hardware Specifications

MCU: STM32F411 (Bluetooth/BLE), STM32F412 (Wi-Fi + Bluetooth/BLE)

Wi-Fi Radio: TI WL1831MOD / WL1837MOD

  • 802.11 a/b/g/n
  • 2.4 GHz & 5 GHz
  • -96.3dBm RX Sensitivity
  • STA, AP & Wi-Fi Direct Modes

Bluetooth / Bluetooth LE Radio: TI WL1831MOD / WL1837MOD

  • Dual-mode Bluetooth & Bluetooth Low Energy
  • Bluetooth v4.1 Compliance and CSA2 Support
  • Host Controller Interface (HCI) Transport for Bluetooth Over UART

I/O Signals: ADC, GPIO, I2C, I2S, SPI, UART, USB

Industrial Temperature Grade: -40°C to +85°C

Software Specifications

Supported Technologies: Wi-Fi WLAN, Wi-Fi Direct Concurrent Operation (Multichannel, Multirole), Bluetooth, Bluetooth LE

You can get your own products from Clarinox by filling this inquiry. More details about Koala Connect Modules are available here, also a start manual for KoalaEVM is available here.

Current Sensor Amplifier & Over Current Switch

Current sensor amplifier and over current switch project is based on ACS714-30A current sensor and LM358 Op-amp, ½ of  LM358 op-amp used as an amplifier for low voltage  and 2nd 1/2 LM358 op-amp used as comparator which provides over current TTL output, trimmer potentiometer provided to set the over current limit.  ACS714 sensor measures the current up to +/-30Amps, final output of the amplifier is 235mV/1A, and normally over current output is High-TTL, its goes low once the current over shoot than a set point. Circuit requires 5V DC and 40mA, Onboard LED indicates the power. Resistor divider R1, R3 provides bus voltage output for micro-controller interface to measure the bus voltage, choose appropriate value for R3, R1 as per your application and bus voltage, it’s should be less than 5V DC.

Current Sensor Amplifier & Over Current Switch – [Link]

Early Diagnosis Now Possible With Smart Bandage

IoE era is here since we are able now to add mobile radio capabilities in our applications! The latest incarnation of the cell phone network will offer internet connectivity and possibilities that could only be dreamt of previously depending on your standpoint, and many more factors.

And now let’s embed these concept in medical applications, like “Smart Bandage” . It is conceivable that sensors embedded in a medical dressing could continuously monitor the wound healing process and send alerts to medical personnel when an infection is detected.  Maybe the patient could not tell accurately  since the pain is not a valid indicator of biological dysfunction. The problem is that we all have different thresholds; some stalwarts may endure the pain and only end up visiting a doctor as a last resort when the simple infection has developed into something nastier. Other patients will be convinced that a slight twinge is evidence of a life threatening condition. An objective assessment of the patient’s state of health will not only be reassuring to the patient, but also lead to a more efficient use of medical resources and reduced health care costs.

For this reason, band-aids with sensors and 5G network interfaces seem like a win-win formula. They will give the doctor an early indication of problems and may even be able to run rudimentary diagnostics to indicate the cause of the problem. Instead of long waiting times for appointments and expensive laboratory tests we could, for example get an immediate recommendation of an effective antibiotic. This is just one small example of the many benefits that the IoE will eventually bring to medical care in the future.

“That intelligent dressing uses nano-technology to sense the state of that wound at any one specific time. It would connect that wound to a 5G infrastructure and that infrastructure through your telephone will also know things about you – where you are, how active you are at any one time. You combine all of that intelligence so the clinician knows the performance of the specific wound at any specific time and can then tailor the treatment protocol to the individual and wound in question.” – Prof Marc Clement, chairman of the Institute of Life Science (ILS).

 

Via: Elektor

1 Cent Lab-On-A-Chip For Early Diagnostics

Researchers at the Stanford University School of Medicine have developed a way to produce a cheap and reusable diagnostic “lab on a chip” with the help of an ordinary inkjet printer. At a production cost of as little as 1 cent per chip, the new combination of microfluidics, electronics and inkjet printing technology could usher in a medical diagnostics revolution like the kind brought on by low-cost genome sequencing, said Ron Davis, PhD, professor of biochemistry and of genetics and director of the Stanford Genome Technology Center.

Lab on a Chip – Zahra Koochak

The lab on a chip consists of two parts: a clear silicone microfluidic chamber for housing cells and a reusable electronic strip and  a regular inkjet printer that can be used to print the electronic strip onto a flexible sheet of polyester using commercially available conductive nano-particle ink.

“Enabling early detection of diseases is one of the greatest opportunities we have for developing effective treatments,” Rahim Esfandyarpour said, a PhD and an engineering research associate at the genome center. “Maybe $1 in the U.S. doesn’t count that much, but somewhere in the developing world, it’s a lot of money.”

Designed as a multi-functional platform, one of its applications is that it allows users to analyse different cell types without using fluorescent or magnetic labels that are typically required to track cells. Instead, the chip separates cells based on their intrinsic electrical properties:

When an electric potential is applied across the inkjet-printed strip, cells loaded into the microfluidic chamber get pulled in different directions depending on their “polarisability” in a process called dielectrophoresis. This label-free method to analyse cells greatly improves precision and cuts lengthy labeling processes.

Rahim Esfandyarpour helped to develop a way to create a diagnostic “lab on a chip” for just a penny.
Zahra Koochak

The tool is designed to handle small-volume samples for a variety of assays. The researchers showed the device can help capture single cells from a mix, isolate rare cells and count cells based on cell types.The low cost of the chips could democratize diagnostics similar to how low-cost sequencing created a revolution in health care and personalized medicine, Davis said. Inexpensive sequencing technology allows clinicians to sequence tumor DNA to identify specific mutations and recommend personalized treatment plans. In the same way, the lab on a chip has the potential to diagnose cancer early by detecting tumor cells that circulate in the bloodstream.

Via: Stanford Medicine

Fast Single-Pixel Camera

Compressed sensing is an new computational technique to extract large amounts of information from a signal. Researchers from Rice University, for example, have built a camera that can generate 2D-images using only a single light sensor (‘pixel’) instead of the millions of pixels in the sensor of a conventional camera.

This compressed sensing technology is rather inefficient for forming images: such a single-pixel camera needs to take thousands of pictures to produce a single, reasonably sharp image. Researchers from the MIT Media Lab however, have developed a new technique that makes image acquisition using compressed sensing fifty times more efficient. In the example of the single-pixel camera that means that the number of exposures can be reduces to several tens.

One intriguing aspect of compressed sensing is that no lens is required – again in contrast with a conventional camera. That makes this technique also particularly interesting for applications at wavelengths outside of the visible spectrum.

In compressed sensing, use is made of the time differences between the reflected light waves from the object to be imaged. In addition, the light that strikes the sensor has a pattern – as if it passed through a checkerboard with irregular positioned transparent and opaque fields. This could be obtained with a filter or using a micro-mirror array where some mirrors are directed towards the sensor and others are not.

The sensor each time measures only the cumulative intensity of the incoming light. But when this measurement is repeated often enough, each time with a different pattern, then the software can derive the intensity of the light that is reflected from different points of the subject.

Source: Elektor

Ther Robot Core

Robot Core – The Ultimate Raspberry Pi Robot Controller

The Robot Core, which is a robot control board for the Raspberry Pi and Arduino, brings many different elements into one awesome package. It allows you to efficiently control motors, servos, and read sensor data without needing 3-4 additional boards to hookup. Several Robot Core boards can be connected together in a linear series to add even more functionality.

The Robot Core board
The Robot Core board

Robot Core uses I²C (Inter-Integrated Circuit) to communicate with Raspberry Pi. I²C is a widely used serial computer bus invented by Philips Semiconductor. It is a very easy-to-use two-wire bus that your Pi has no difficulty talking with. A built-in level shifter ensures compatibility to both 3.3 volt and 5 volts I²C buses. The Robot Core supports all Raspberry Pi boards (the past and present versions) and some Arduino boards also.

Now, let’s talk about the technical details.

Software Support:

The board has software provided in the form of libraries and python example programs to get you started fast. Thanks to Second Robotics for making the software Open Source. All required resources will be available in July 2017. Currently, available links are – Drivers and LibrariesSupport Documents.

Software for The Robot Core
Software for The Robot Core
The Robot Core Python Script
The Robot Core Python Script

Motor Drive:

This board provides up to two 5 Amp continuous load DC motor outputs that can be used as a pair to drive a single stepper motor. The Robot Core’s built in safety protection prevents overheating and detects the motor failure.

Servo Control:

The Robot Core can set servos to exact position with the help of 16 bit PWM signal. It has eight ports for both analog and digital conventional servos. You can tune each servo using software-based GUI tuning method and also set their start-up positions individually.

Two ports are provided for connecting Dynamixel servos. Connecting multiple Dynamixel servos at the same time is supported. All functionalities are accessible by simple low-level commands. Many example python codes are available there to get started with Dynamixel servos.

Ultrasonic Sensors:

You can connect up to 4 ultrasonic sensors (HC-SR04) with the board. Given libraries convert measured distance into millimeter. The Robot Core board can provide filtered outputs with higher accuracy or raw outputs with greater speed, the choice is yours.

Analog Input:

Up to 8 12-bit analog inputs are supported for sensors or feedback. Each input has a range of 0-5V and the board also provides protection from exceeding the input limits. The additional analog reading for main power voltage lets you monitor supply voltage in real-time. The Robot Core has configurable warnings for low power.

Power:

The range of input voltage is 6.4v to 14v. An onboard DC-DC regulator is there for generating 5 volts, capable of providing 6 Amps current to the load. Optional separate power supply inputs for servos and for Dynamixel servos are also present.

Other Technical Information:

  • Clear on-board labeling. Each port and screw terminal has its pins labeled.
  • Prototyping space for adding more functionality. This space removable to make the board smaller.
  • Easy to access voltage rails.
  • Access to the Raspberry Pi I²C at 5V logic level.
  • Status LEDs are for main power voltage, DC motor status, and script controllable status.
RobotCore board details
Robot Core board details

Application Of The Robotcore Board:

The Robot Core is an all-in-one solution for many projects. One can do pretty much any autonomous and/or robotics projects with this board. The possibilities are endless. Below are just some example projects:

  • A smart plant monitoring system that reads ambient light, temperature, plant moisture, and even uses two water pumps to water two different plants.
  • Using a single board, you can build a 2 wheeled robot with a ring of 8 analog ultrasonic sensors and a strong Dynamixel smart servo arm.
  • With an IMU (Inertial Measurement Unit) tied into the I²C bus, you can create a two-wheeled self-balancing robot.
  • Build a biped walker robot with sensors to navigate based around the board and a Pi using powerful servos or Dynamixel smart servos.
  • Make an automated greenhouse. Have analog sensors for light, temperature, carbon dioxide, moisture, water leaks, and also control two water pumps.
The Robot Core plant watering system
The Robot Core plant watering system

Smallest seismic sensor uses vibration spectral analysis

Graham Prophet @ eedesignnewseurope.com discuss about a new small seismic sensor from Omron:

Omron Electronic Components believes it has the world’s smallest class size seismic sensor, specifically designed to trigger the shutdown of potentially hazardous or easily damaged systems in the event of an earthquake.

Smallest seismic sensor uses vibration spectral analysis – [Link]