Internet of Things (IoT) Resources

Here we list several handy resources for engineers interested in the Internet of Things (IoT).IoT-WordCloud

  • The IoT Events site is an easy-to-use resource for find IoT events and meet-ups around the world.
  • The Internet of Things Conference is a resource for information relating to “IoT applications, IoT solutions, IoT example and m2m opportunities in smart cities, connected cars, smart grids, consumer electronics and mobile healthcare.”
  • The IoT Counsel website includes useful info such as bios and contact info for engineers, innovators, and thinkers working on IoT-related projects.
  • Michael Chui, Markus Loffler, and Roger Roberts present a comprehensive article on IoT in the McKinsey Quarterly. While this isn’t a design-centric document, you’ll find it’s an interesting in-depth overview of the technology and its applications.
  • The Business Leaders Network (BLN) has a page on the IoT. The most recent IoT even took place in June, but the site still has some interesting info about speakers, partners, and more.

Let us know about other good resources. Send your links via email or Twitter @circuitcellar.

New Products: July 2013



The USBee QX is a PC-based mixed-signal oscilloscope (MSO) integrated with a protocol analyzer utilizing USB 3.0 and Wi-Fi technology. The highly integrated, 600-MHz MSO features 24 digital channels and four analog channels.

With its large 896-Msample buffer memory and data compression capability, the USBeeQX can capture up to 32 days of traces. It displays serial or parallel protocols in a human-readable format, enabling developers to find and resolve obscure and difficult defects. The MOS includes popular serial protocols (e.g., RS-232/UARTs, SPI, I2C, CAN, SDIO, Async, 1-Wire, and I2S), which are typically costly add-ons for benchtop oscilloscopes. The MOS utilizes APIs and Tool Builders that are integrated into the USBee QX software to support any custom protocol.

The USBee QX’s Wi-Fi capability enables you set up testing in the lab while you are at your desk. The Wi-Fi capability also creates electrical isolation of the device under test to the host computer.

The USBee QX costs $2,495.

CWAV, Inc.


DownStream Technologies FabStream


FabStream is an integrated PCB design and manufacturing solution designed for the DIY electronics market, including small businesses, start-ups, engineers, inventors, hobbyists, and other electronic enthusiasts. FabStream consists of free SoloPCB Design software customized to each manufacturing partner in the FabStream network.

The FabStream service works in three easy steps. First, you log onto the FabStream website (, select a FabStream manufacturing partner, and download the free design software. Next, you create PCB libraries, schematics, and board layouts. Finally, the software leads you through the process of ordering PCBs online with the manufacturer. You only pay for the PCBs you purchase. Because the service is mostly Internet-based, FabStream can be accessed globally and is available 24/7/365.

FabStream’s free SoloPCB Design software includes a commercial-quality schematic capture, PCB layout, and autorouting in one, easy-to-use environment. The software is customized to each manufacturing partner. All of the manufacturer’s production capabilities are built into SoloPCB, enabling you to work within the manufacturers’ constraints. Design changes can be made and then verified through an integrated analyzer that uses a quick pass/fail check to compare the modification to the manufacturer’s rules.

SoloPCB does not contain any CAM outputs. Instead, a secure, industry-standard IPC-2581 manufacturing file is automatically extracted, encrypted, and electronically routed to the manufacturer during the ordering process. The IPC-2581 file contains all the design information needed for manufacturing, which eliminates the need to create Gerber and NC drill files.

FabStream is available as a free download. More information can be found at

DownStream Technologies, LLC


Rohde Schwarz SMW200A


The R&S SMW200A high-performance vector signal generator combines flexibility, performance, and intuitive operation to quickly and easily generate complex, high-quality signals for LTE Advanced and next-generation mobile standards. The generator is designed to simpify complex 4G device testing.

With its versatile configuration options, the R&S SMW200A’s range of applications extends from single-path vector signal generation to multichannel multiple-input and multiple-output (MIMO) receiver testing. The vector signal generator provides a baseband generator, a RF generator, and a real-time MIMO fading simulator in a single instrument.

The R&S SMW200A covers the100 kHz-to-3-GHz, or 6 GHz, frequency range, and features a 160-MHz I/Q modulation bandwidth with internal baseband. The generator is well suited for verification of 3G and 4G base stations and aerospace and defense applications.

The R&S SMW200A can be equipped with an optional second RF path for frequencies up to 6 GHz. It can have a a maximum of two baseband and four fading simulator modules, providing users with two full-featured vector signal generators in a single unit. Fading scenarios, such as 2 × 2 MIMO, 8 × 2 MIMO for TD-LTE, and 2 × 2 MIMO for LTE Advanced carrier aggregation, can be easily simulated.

Higher-order MIMO applications (e.g., 3 × 3 MIMO for WLAN or 4 × 4 MIMO for LTE-FDD) are easily supported by connecting a third and fourth source to the R&S SMW200A. The R&S SGS100A are highly compact RF sources that are controlled directly from the front panel of the R&S SMW200A.

The R&S SMW200A ensures high accuracy in spectral and modulation measurements. The SSB phase noise is –139 dBc (typical) at 1 GHz (20 kHz offset). Help functions are provided for additional ease-of-use, and presets are provided for all important digital standards and fading scenarios. LTE and UMTS test case wizards simplify complex base station conformance testing in line with the 3GPP specification.

Contact Rohde & Schwarz for pricing.

Rohde & Schwarz


Texas Instruments CC2538


The Texas Instruments (TI) CC2538 system-on-chip (SoC) is designed to simplify the development of ZigBee wireless connectivity-enabled smart energy infrastructure, home and building automation, and intelligent lighting gateways. The cost-efficient SoC features an ARM Cortex-M3 microcontroller, memory, and hardware accelerators on one piece of silicon. The CC2538 supports ZigBee PRO, ZigBee Smart Energy and ZigBee Home Automation and lighting standards to deliver interoperability with existing and future ZigBee products. The SoC also uses IEEE 802.15.4 and 6LoWPAN IPv6 networks to support IP standards-based development.

The CC2538 is capable of supporting fast digital management and features scalable memory options from 128 to 512 KB flash to support smart energy infrastructure applications. The SoC sustains a mesh network with hundreds of end nodes using integrated 8-to-32-KB RAM options that are pin-for-pin compatible for maximum flexibility.

The CC2538’s additional benefits include temperature operation up to 125°C, optimization for battery-powered applications using only 1.3 uA in Sleep mode, and efficient processing for centralized networks and reduced bill of materials cost through integrated ARM Cortex-M3 core.

The CC2538 development kit (CC2538DK) provides a complete development platform for the CC2538, enabling users to see all functionality without additional layout. It comes with high-performance CC2538 evaluation modules (CC2538EMK) and motherboards with an integrated ARM Cortex-M3 debug probe for software development and peripherals including an LCD, buttons, LEDs, light sensor and accelerometer for creating demo software. The boards are also compatible with TI’s SmartRF Studio for running RF performance tests. The CC2538 supports current and future Z-Stack releases from TI and over-the-air software downloads for easier upgrades in the field.

The CC2538 is available in an 8-mm x 8-mm QFN56 package and costs $3 in high volumes. The CC2538 is also available through TI’s free sample program. The CC2538DK costs $299.

Texas Instruments, Inc.

Embedded Sensor Innovation at MIT

During his June 5 keynote address at they 2013 Sensors Expo in Chicago, Joseph Paradiso presented details about some of the innovative embedded sensor-related projects at the MIT Media Lab, where he is the  Director of the Responsive Environments Group. The projects he described ranged from innovative ubiquitous computing installations for monitoring building utilities to a small sensor network that transmits real-time data from a peat bog in rural Massachusetts. Below I detail a few of the projects Paradiso covered in his speech.


Managed by the Responsive Enviroments group, the DoppelLab is a virtual environment that uses Unity 3D to present real-time data from numerous sensors in MIT Media Lab complex.

The MIT Responsive Environments Group’s DoppleLab

Paradiso explained that the system gathers real-time information and presents it via an interactive browser. Users can monitor room temperature, humidity data, RFID badge movement, and even someone’s Tweets has he moves throughout the complex.

Living Observatory

Paradiso demoed the Living Observatory project, which comprises numerous sensor nodes installed in a peat bog near Plymouth, MA. In addition to transmitting audio from the bog, the installation also logs data such as temperature, humidity, light, barometric pressure, and radio signal strength. The data logs are posted on the project site, where you can also listen to the audio transmission.

The Living Observatory (Source:


The GesturesEverywhere project provides a real-time data stream about human activity levels within the MIT Media Lab. It provides the following data and more:

  • Activity Level: you can see the Media Labs activity level over a seven-day period.
  • Presence Data: you can see the location of ID tags as people move in the building

The following video is a tracking demo posted on the project site.

The aforementioned projects are just a few of the many cutting-edge developments at the MIT Media Lab. Paradiso said the projects show how far ubiquitous computing technology has come. And they provide a glimpse into the future. For instance, these technologies lend themselves to a variety of building-, environment-, and comfort-related applications.

“In the early days of ubiquitous computing, it was all healthcare,” Paradiso said. “The next frontier is obviously energy.”

Embedded Wireless Made Simple

Last week at the 2013 Sensors Expo in Chicago, Anaren had interesting wireless embedded control systems on display. The message was straightforward: add an Anaren Integrated Radio (AIR) module to an embedded system and you’re ready to go wireless.

Bob Frankel demos embedded mobile control

Bob Frankel of Emmoco provided a embedded mobile control demonstration. By adding an AIR module to a light control system, he was able to use a tablet as a user interface.

The Anaren 2530 module in a light control system (Source: Anaren)

In a separate demonstration, Anaren electrical engineer Mihir Dani showed me how to achieve effective light control with an Anaren 2530 module and TI technology. The module is embedded within the light and compact remote enables him to manipulate variables such as light color and saturation.

Visit Anaren’s website for more information.

New Products: May 2013


iC-Haus iC-TW8

The iC-TW8 is a high-resolution signal processor designed to evaluate sine/cosine sensors. Its automatic functions help minimize angular errors and jitters. The processor can be used for initial, push-button calibration and to permanently adapt signal-path parameters during operation. The angular position is calculated at a programmable resolution of up to 65,536 increments per input cycle and output as an indexed incremental signal. A 32-bit word, which includes the counted cycles, is available through the SPI.

As an application-specific DSP, the iC-TW8 has two ADCs that simultaneously sample at a 250-ksps rate, fast CORDIC algorithms, special signal filters, and an analog front end with differential programmable gate amplifier (PGA) inputs that accepts typical magnetic sensor signals from 20 mVPP and up. Signal frequencies of up to 125 kHz enable high rotary and linear speeds for position measuring devices and are processed at a 24-µs constant latency period.

The device’s 12-bit measurement accuracy works with one button press. Measuring tools are not required. The iC-TW8 independently acquires information about the signal corrections needed for offset, amplitude, and phase errors and stores them in an external EEPROM.

The iC-TW8 has two configuration modes. Preset functions and interpolation factors can be retrieved through pins and the device can be calibrated with a button push. No programming is required for initial operation.

The device’s functions—including an AB output divider for fractional interpolation, an advanced signal filter to reduce jitter, a table to compensate for signal distortion, and configurable monitors for errors and signal quality—can be accessed when the serial interfaces are used. Typical applications include magnetic linear displacement measuring systems, optical linear scales, programmable magnetic/optical incremental encoders, high-resolution absolute/incremental angle sensors with on-axis, Hall scanning, and the general evaluation of sine/cosine signals (e.g., PC measuring cards for 1 VPP and 11 µAPP).

The iC-TW8 operates on a 3.1-to-5.5-V single-ended supply within a –40°C-to-125°C extended operating temperature range. It comes in a 48-pin QFN package that requires 7 mm × 7 mm of board space. A ready-to-operate demo board is  available for evaluation. An optional PC operating program, in other words, a GUI, can be connected with a USB adapter.

The iC-TW8 costs $7.69 in 1,000-unit quantities.

iC-Haus GmbH


Analog Devices AD9675

The AD9675 and the AD9674 are the latest additions to Analog Devices’s octal ultrasound receiver portfolio. The devices and are pin compatible with the AD9670/AD9671.

The AD9675 is an eight-channel ultrasound analog front end (AFE) with an on-chip radio frequency (RF) decimator and Analog Devices’s JESD204B serial interface. It is designed for mid- to high-end portable and cart-based medical and industrial ultrasound systems. The device integrates eight channels of a low-noise amplifier, a variable-gain amplifier, an anti-aliasing filter, and a 14-bit ADC with a 125-MSPS sample rate and a 75-dB signal-to-noise ratio (SNR) performance for enhanced ultrasound image quality. The on-chip RF decimator enables the ADC to be oversampled, providing increased SNR for improved image quality while maintaining lower data I/O rates. The 5-Gbps JESD204B serial interface reduces ultrasound system I/O data routing.

The AD9674 offers similar functionality, but includes a standard low-voltage differential signaling (LVDS) interface. Both devices are available in a 144-ball, 10-mm × 10-mm ball grid array (BGA) package.

The AD9674 and the AD9675 cost $62 and $68, respectively.

Analog Devices, Inc.


Melexis MLX92212

Melexis MLX92212

MLX92212 digital output Hall-effect sensors are AEC-Q100-qualified devices that deliver robust, automotive-level performance. The MLX92212LSE-AAA low-hysteresis bipolar latch and the MLX92212LSE-ABA high-hysteresis unipolar switch are optimized for 2.5-to-5.5-V operation. They pair well with many low-power microcontrollers in embedded systems. The sensor and specified microcontroller can share the same power rail. The sensors’ open-drain outputs enable simple connectivity with CMOS/TTL. They exhibit minimal magnetic switch point drift over temperature (up to 150°C) or lifetime and can withstand 8 kV electrostatic discharge.

The MLX92212LSE-AAA is designed for use with multipole ring magnets or alternating magnetic fields. It is well suited for brushless DC electric motor commutation, speed sensing, and magnetic encoder applications. Typical automotive uses include anti-trap/anti-pinch window lift controls, automatic door/hatch systems, and automatic power seat positioning. The MLX92212LSE-ABA enables the use of generic/weak magnets or larger air gaps. It can be used in simple magnetic proximity sensing and interlocks in covers/hatches or ferrous-vane interrupt sensors for precise position and timing applications.

Both MLX92212 devices utilize chopper-stabilized amplifiers with switched capacitors. The CMOS technology makes this technique possible and contributes to the sensors’ low current consumption and small chip size.

The MLX92212 sensors cost $0.35 each in 5,000-unit quantities and $0.30 in 10,000-unit quantities.

Melexis Microelectronic Integrated Systems


Byte SPI Storm

Byte SPI Storm

The SPI Storm 50 and the SPI Storm 10 are the latest versions of Byte Paradigm’s SPI Storm serial protocol host adapter. The adapters support serial peripheral interface (SPI), Quad-SPI, and custom serial protocols in the same USB device.

The SPI Storm 50 and the SPI Storm 10 support serial protocols and master up to 50 and 10 MHz, respectively. The SPI Storm 10 features an 8-MB memory, while the higher-end devices are equipped with a 32-MB memory.

The SPI Storm adapters enable system engineers to access, communicate, and program their digital board and digital ICs, such as field-programmable gate array (FPGA), flash memories, application-specific integrated circuit (ASIC), and

system-on-a-chip (SoC). The SPI Storm 10 is well suited for engineering schools and universities because it is a flexible, all-around access device for hands-on digital electronics. The 50- and 100-MHz versions can be used in mid- and high-end testing and debugging for telecommunications, medical electronics, and digital imaging industries.

The SPI Storm 50 and the SPI Storm 10 cost $530 and $400, respectively.

Byte Paradigm


Microchip MCP19111

Microchip MCP19111

The MCP19111 digitally enhanced power analog controller is a new hybrid, digital and analog power-management device. In combination with the expanded MCP87xxx family of low-figure-of-merit (FOM) MOSFETs, it supports configurable, high-efficiency DC/DC power-conversion designs for many consumer and industrial applications.

The MCP19111 controller, which operates at 4.5 to 32 V, integrates an analog-based PWM controller with a fully functional flash-based microcontroller. This integration offers the flexibility of a digital solution with the speed, performance, and resolution of an analog-based controller.

The MCP19111 devices have integrated MOSFET drivers configured for synchronous, step-down applications. The MCP87018, MCP87030, MCP87090, and MCP87130 are 25-V-rated, 1.8-, 3-, 9-, and 13-mΩ logic-level MOSFETs that are specifically optimized for switched-mode-power-supply (SMPS) applications.

The MCP19111 evaluation board includes Microchip’s high-speed MOSFETs. This evaluation board includes standard firmware, which is user-configurable through an MPLAB X IDE graphical user interface (GUI) plug-in. The combined evaluation board, GUI, and firmware enable power-supply designers to configure and evaluate the MCP19111’s performance for their target applications.

The MCP19111 controllers cost $2.81 each and the MCP87018/030/090/130 MOSFETs cost $0.28 each, all in 5,000-unit quantities.

Microchip Technology, Inc.


Ironwood SG-QFE-7011

Ironwood SG-QFE-7011

The SG-QFE-7011 is a high-performance QFP socket for 0.4-mm pitch, 128-pin QFPs. The socket is designed for a

1.6-mm × 14-mm × 14-mm package size with a 16-mm × 16-mm lead tip to tip. It operates at bandwidths up to 10 GHz with less than 1 dB of insertion loss and has a typical 20 mΩ per I/O contact resistance. The socket connects all pins with 10-GHz bandwidth on all connections. The small-footprint socket is mounted with supplied hardware on the target PCB. No soldering is required. The small footprint enables inductors, resistors, and decoupling capacitors to be placed close to the device for impedance tuning.

The SG-QFE-7011’s swivel lid has a compression screw that enables ICs to be quickly changed out. The socket features a floating compression plate to force down the QFP leads on to elastomer. A hard-stop feature is built into the compression mechanism.

The sockets are constructed with high-performance, low-inductance gold-plated embedded wire on elastomer as interconnect material between a device and a PCB. They feature a –35°C-to-100°C temperature range, a 0.15-nH pin self inductance, a 0.025-nH mutual inductance, a 0.01-pF capacitance to ground, and a 2-A per pin current capacity.

The SG-QFE-7011 costs $474.

Ironwood Electronics