2 Channel Relay Shield for Arduino Nano

2 Channel Mini easy to use Relay shield for Arduino Nano consists of ULN2003 IC and 2 Mini 12V Relays with NO/NC contacts of 2A-24V Load Capacity. ULN2003 used as Relay coil driver. Relay can be controlled from D3 and D4 of Arduino Nano. Three pin Header Connector CN1 and CN2 provided to connect the Load. Relay has normally open and normally closed contacts with 2A and 24V capacity and also can handle 120V AC but it’s not advisable. CN2 supply input 12V DC. LED D2 and D3 are the output LEDs.

Features

  • Supply 12V DC
  • Relay Load 2A-24V DC (120V AC Possible with Care)
  • Relay Switch Normally Closed/Normally Open
  • On Board LED D2 and D3 Operation Indicator

2 Channel Relay Shield for Arduino Nano – [Link]

Introducing the Arduino MKR WAN 1300 and MKR GSM 1400

Arduino has introduced a pair of new IoT boards with embedded LoRa and GSM capabilities.

The Arduino MKR WAN 1300 and MKR GSM 1400 are designed to offer a practical and cost-effective solution for developers, makers and enterprises, enabling them to quickly add connectivity to their projects and ease the development of battery-powered IoT edge applications.

Both of the highly compact boards measure just 67.64 x 25mm, together with low power consumption, making them an ideal choice for emerging battery-powered IoT edge devices in the MKR form factor for applications such as environmental monitoring, tracking, agriculture, energy monitoring and home automation.

Introducing the Arduino MKR WAN 1300 and MKR GSM 1400 – [Link]

IkaScope: a wireless oscilloscope probe

IkaScope is a wireless oscilloscope probe that allows to observe the change of electrical signals over time. The probe is a handheld device, portable and fits perfectly in the hand and pocket. By using high-speed Wi-Fi connection, IkaScope wireless oscilloscope probe communicates with laptop, tablet or smartphone to share the acquired data on the screen. The IkaScope wireless oscilloscope probe is compatible with the most popular mobile and desktop operating systems. The probe has a 200 MSPs ADC, Spartan 3 FPGA and adequate battery capacity (450 mAh). Energy saving settings and downtime moments manage the energy efficiency. The probe comes with a ground clip and a USB charging cable. Especially relevant is the patented ProbeClick technology of IkaScope: all electronic circuits are powered only when the the probe is pressed (figure 1). The probe tip is also used to start the data acquisition. ProbeClick technology allows to save power and measure without remembering to press the run / stop button of a classic oscilloscope.

wireless oscilloscope probe
Figure 1: IkaScope wireless oscilloscope probe

The probe technology and user interface

ProbeClick represents a simple innovative mechanism to manage the data acquisition by probe tip. Simply by pressing the probe, the device starts data capturing and streaming process on the screen using the wi-fi connection. In addition, by releasing the probe, the acquisition stops and automatically the data is available in the storage/cloud (figure 2). IkaScope application is the user interface to capture, measure and analyze analog signals. From the download page you can download the latest version of IkaScope for your prefered Desktop OS.

wireless oscilloscope probe
Figure 2: IkaScope during a testing process

 

IkaScope can be configured as a wireless hotspot. It will remember access points and will connect instantly without having to enter your login password. Moreover, IkaScope application has a share button at the top left of the screen. Just click on it to share a screenshot of the measurement.

General specifications

  • Model name: WS200.
  • Communication: WiFi 802.11 b/g/n/e/i 2.4GHz.
  • Connection: Access Point or Station.
  • Battery charging connector: Micro USB.
  • Input contact: ProbeClick.
  • Operating Temperature: 10°C to 35°C.
  • Altitude < 2000m.
  • Protection Input level: Sample test voltage: 253 VAC 1 min.
  • Input to charging port isolation: Saple test voltage: 1100 VAC 1 min.
  • Battery: Built in Lithium / 420mAh
  • Application compatibility: Windows / Mac / Linux / Android / iOS.

Measurement specifications

  • Max sample rate: 200MSps.
  • Analog Bandwidth(-3dB compression): 30MHz at -3dB.
  • Input Voltage: +/-40V range CAT1.
  • Galvanic isolation: Between Input and Charging port.
  • Coupling: AC (true) / DC.
  • Input Impedance: 1MOhm || 14pF.
  • Voltage resolution: 100mV/div up to 10V/div.
  • Max Trace refresh rate: 250 FPS.
  • Sample resolution: 8 bits.
  • Analog Offset range: +/-20V to +/-40V.
  • Memory depth: 4K Points (4 x 1000 points burst buffers).
  • Channel: 1

Researchers Develop Long Range Backscatter Sensors That Consume Almost No Power

Researchers at the University of Washington developed a new backscatter sensors that can operate over long ranges with very little power. The researchers demonstrated for the first time that the device runs on almost zero power and can transmit data across distances of up to 2.8 kilometers.

The long-range backscatter system developed by UW researchers
The long-range backscatter system developed by UW researchers

Backscatter communication works by emitting a radio signal and then monitoring the reflections of that signal from sensors. As the transmitter generates the signal, the sensors themselves require very little power. But this kind of system badly suffers from noise. Noise can be added anywhere – on the transmitter side, on the channel or on the sensor array. The key to solving this problem is a new type of signal modulation called chirp spread spectrum.

By using the chirp spread spectrum modulation technique, the team was able to transmit data up to 2.8 kilometers while the sensors themselves consumed only a few microwatts of power. Such extremely low power consumption lets them run by harvested ambient energy and very small printed batteries. The cost is surprisingly cheap too. The sensors would cost just 10 to 20 cents per unit if bulk purchased.

Today’s flexible electronics and other sensors need to operate with very low power typically can’t communicate with other devices more than a few feet or meters away. By contrast, the University of Washinton’s long-range backscatter system achieved pretty strong coverage throughout a 4800-square-foot house, an office area including 41 rooms, and a one-acre vegetable farm at extremely low power and low cost.

Shyam Gollakota, the lead faculty and associate professor in the Paul G. Allen School of Computer Science & Engineering, said,

Until now, devices that can communicate over long distances have consumed a lot of power. The tradeoff in a low-power device that consumes microwatts of power is that its communication range is short. Now we’ve shown that we can offer both, which will be pretty game-changing for a lot of different industries and applications.

These low-power sensors have endless potential applications. They can be used for everything from wearable health monitors to scientific data collection devices. Though there are no confirmed products yet, the team has created few prototypes in the form of flexible sensors worn on the skin, smart contact lenses, and more.

2.9″ ESPaper Lite Kit for $39.90

The 2.9″ ESPaper Lite Kit contains most of the parts you need to display data over wifi:

With the 2.9″ ESPaper module you can display data retrieved over WiFi on an ePaper with little effort. The integrated ESP8266 Wroom-02 module updates the 296×128 B&W ePaper display over the SPI bus. The module also features a charging circuit for LiPo batteries and a JST connector which allows you to run the module for weeks or even months from a battery. How long the module can be run from battery mostly depends on the update frequency and the battery capacity. In tests we could run the module from a 800mAh LiPo battery for several weeks by updating weather information every 20 minutes.

2.9″ ESPaper Lite Kit for $39.90 – [Link]

Teardown & Repair of an Agilent N1912A P-Series Power Meter

In this episode Shahriar investigates a peculiar problem with an Agilent P-Series Power Meter. While the instruments works during startup, after about 10 minutes the LCD screen begins to flicker and become scrambled. Initial investigation reveals that the issue is not likely with the main motherboard since USB connection to the instrument and data-readout is possible even when the LCD screen is malfunctioning.

Teardown & Repair of an Agilent N1912A P-Series Power Meter – [Link]

FemtoUSB Board (Atmel ARM Cortex M0+)

Arduino compatible, Atmel SAM D21 chip, open source!

This is one of the smallest ARM powered boards in the world. If you are ready to transition away from AVR 8-bit hardware to the very powerful ARM 32-bit stuff, this is the way to learn! The board design, schematic, and parts lists are completely open-source.

FemtoUSB Board (Atmel ARM Cortex M0+) – [Link]

Dremel Introduces The First-Ever Dremel Digilab Laser Cutter

The Dremel Laser Cutter backed by 85 years of the Dremel brand legacy, will provide a higher level of safety, ease, reliability and quality to users. (PRNewsfoto/Dremel)

The Dremel DigiLab Laser Cutter enables Makers to expand portfolio and business capabilitie.

MOUNT PROSPECT, Ill., Sept. 23, 2017 /PRNewswire/ — At World Maker Faire New York, Dremel introduces the first-of-its-kind Dremel DigiLab Laser Cutter. Dremel designed this machine to provide Makers of all levels and practices with an outlet for innovation. As the brand’s latest addition to its lineup of digital fabrication tools, it has the ability to customize a variety of materials quicker and easier than ever before.

The Dremel Laser Cutter backed by 85 years of the Dremel brand legacy, will provide a higher level of safety, ease, reliability and quality to users. This tool can cleanly slice through tougher materials like wood, acrylic, leather and paper as well as neatly engrave tougher surfaces such as glass and anodized metal. Dremel President John Kavanagh shared how the new Dremel Laser Cutter will enhance the productivity of Makers and industrial professionals across a broad spectrum of applications.

The new Dremel Laser Cutter allows a level of precision you just can’t get by hand because it is so detailed,” Kavanagh said. “It is truly designed and built for business owners to personalize any project and improve efficiency. With a higher level of reliability and ease of use, the Dremel DigiLab Laser Cutter eliminates many of the repetitive, laborious steps and allows Makers to create new projects they couldn’t necessarily do before.

iEAT – A Powerful Keychain Detector To Detect Food Allergens

For kids and adults with food allergies, having meals from restaurants or hotels can sometimes be very risky. Even when ultimate care is taken, freshly prepared meals can accidentally become cross-contaminated with an offending food and trigger an allergic reaction. Every year many people end up in the emergency room due to food allergies. Researchers of the Harvard Medical School developed an affordable device called iEAT for detecting allergens, which can reduce the anxiety of the people prone to allergies.

iEAT - A Portable allergen-detection system
iEAT – A Portable allergen-detection system

Conventional methods to detect the hidden allergens require massive laboratory equipment. They are slow and also do not work on a low concentration of allergens. Ralph Weissleder, Hakho Lee, and their colleagues at the Harvard Medical School wanted to make a more practical, consumer-friendly alternative. They reported in the journal ACS Nano the development of a new portable allergen-detection system that features a keychain analyzer for detecting allergens in food anywhere, anytime.

The portable allergen-detection system called integrated exogenous antigen testing or iEAT is small enough to fit in your pocket and it costs $40 only. The iEAT consists of a handheld device to extract allergens from food and an electronic keychain reader for sensing allergens. Then, the result is wirelessly sent to a smartphone. The prototype is able to detect five allergens within 10 minutes, one each from wheat, peanuts, hazelnuts, milk, and egg whites, even if they are in very low concentration.

The main device uses a disposable sample collector which is inserted into the small-sized main unit. The device is so sensitive that the scientists were able to detect gluten in foods advertised as being “gluten-free”. For example, the device detected gluten in salad and an egg protein in beer. Although the prototype was primarily designed to sense five allergens only, the researchers say the device could be expanded to test for many additional compounds, including other allergens and non-food contaminants such as pesticides.

3A Thermoelectric Cooler (TEC) Driver

3A TEC Driver Module is a complete power stage solution to drive Thermoelectric Cooler (TEC). The required DC voltage input controls the output current. It consists of the Texas instruments DRV593 power driver IC, along with a few discrete passive components required for operation. It also includes jumpers for configuring the features of the device, LEDs for fault monitoring, and an output filter. The 4 Pin header connector  for the inputs, 4 pin header connector for  output, and 4 Pin header connector for power supply, provide ease of connection to any system, from an existing design to a bread-boarded prototype. Connect a dc control voltage to CN1 Pin 3 (IN+), ranging from ground to VCC. The Pin 7 of the IC is held to VCC/2 with a resistor voltage divider, as shown in the schematic. Therefore, a dc control voltage of VCC/2 provides 0-V output from PWM to H/C. Input DC voltage range is 1.2V to 3.8V when supply voltage is 5V and 1.2V to 2.1V when supply voltage is 3.3V.

Features

  • 3A Maximum Output Current
  • Low Supply Voltage 2.8V To 5.5V
  • Frequency 500 KHz (Refer to Note To change Frequency)
  • High Efficiency Generates Less Heat
  • Over Current and Thermal Protection
  • Fault LED for Over Current, Thermal & Under Voltage Conditions
  • When J3-Jumper is closed, the board is configured for 500-kHz operation.

3A Thermoelectric Cooler (TEC) Driver – [Link]