The November issue of Circuit Cellar magazine is out soon! Energy harvesting technology, panel PCs, analog ICs in industrial systems, drone design, mesh networks, MQTT, current loop devices and more—this 84-page magazine mixes together a tasty spread of embedded electronics articles for your reading pleasure.
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Here’s a sneak preview of November 2019 Circuit Cellar:
TECH FOR THE IoT AND CONNECTED SYSTEMS
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Energy Harvesting Approaches
By Jeff Child
While many edge devices—particularly in IoT applications—-often need to run off of extremely low power, having an ability to harvest their own power is an even better scenario. Long-battery life is one thing, but not having to replace batteries at all is even better. In this article, Circuit Cellar’s Editor-in-Chief, Jeff Child, looks at the latest technology and product trends in energy harvesting for the IoT.
MQ Telemetry Transport (Part 2)
By Jeff Bachiochi
In Part 1 Jeff described the MQTT protocol and how it can be used by an MQTT server to keep all of your IoT projects tied together and managed from a centralized server running a program like Mosquitto on a local PC. He presented a simple project connecting two IoT nodes together via communications with the server. In Part, Jeff looks at modifying systems he uses to monitor his neighborhood well system and his weather station for integration into the MQTT server.
Self Organizing Wi-Fi Mesh Network
By Daniel Weber and Michaelangelo Rodriguez
Gone are the days when networking embedded devices was a big deal. Today, such devices can be linked in powerful mesh networks over wireless protocols. In this article, learn how these two Cornell students use Microchip PIC32 MCUs and Espressif’s ESP8266 Wi-Fi module to create a mesh network of wirelessly connected devices. The mesh network is able to configure itself and requires no manual intervention to connect the nodes.
Bluetooth-Enabled ECG Monitor
By Brian Millier
Brian has done project articles in the past using Cypress Semiconductor’s PSoC MCUs, including his most recent story about his variable frequency drive project he built using the SoC5LP MCU. This month he explores the latest offering from this MCU family, the PSoC6 5LP MCU. In this project article, Brian selects the Cypress’s CY8CPROTO-063-BLE to build a Bluetooth-enabled ECG monitor.
INDUSTRIAL SYSTEMS AND PROCESS CONTROL
Analog ICs for Industrial Systems
By Jeff Child
Analog and mixed-signal ICs play important roles in industrial automation and process control applications. These system applications depend heavily on innovations in amplifiers, data converters, sensor solutions and more. Circuit Cellar Chief Editor Jeff Child explores the latest technology trends and product developments in these areas.
Product Focus: Panel PCs
By Jeff Child
Panel PCs are a category of display systems that are meant to be mounted on a factory wall or on the side of an industrial machine. And rather than simply being a display, panel PCs embed complete single board computing functionality, providing a complete embedded solution. This Product Focus section updates readers on these technology trends and provides a product gallery of representative panel PCs.
4-20 mA Current Loop Devices and SBCs
By Derek Hildreth
In this article, Technologic Systems’ Derek Hildreth helps you gain deeper understanding of 4-20 mA current loop devices and process control systems. He looks at some history, explains why things are the way they are, looks at simple example components of a process control system (sensor, transmitter, receiver) and works through a practical example with working code.
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Designing Manufacturing Test Systems
By Nishant Mittal
Manufacturing tests are arguably the most important aspect in any kind of hardware design company, be it small or big. Quality is a factor which no company or individual wants to compromise because quality defines the product and ultimately is the main thing which retains a customer. In this article, Xilinx’s Nishant Mittal discusses various techniques to manage quality, cost and corner case catching scenarios in a manufacturing test environment of a board fabrication house.
Multi-Scale Electronic Flute
By Trisha Ray, Parth Bhatt and Qing Yu
Musical instruments such as the piano allow musicians to play in different scales on the same instrument. In contrast, flutes are designed for one scale only. This means a flute player must own an additional flute for every additional scale they want to play in. Learn how these three Cornell students built an PIC32 MCU-based electronic flute that reduces the need for owning multiple flutes by incorporating two buttons that allow a flute player to change the scale and octave.
… AND MORE FROM OUR EXPERT COLUMNISTS
Embedded System Security: Live from Las Vegas
By Colin O’Flynn
This month, Colin summarizes some interesting presentations from the Black Hat conference in Las Vegas, NV—along with an extra bonus event. This will help you keep up-to-date with some of the latest embedded attacks, including execute only memory attacks, fault injection on embedded devices, 4G cellular modems and FPGA bitstream hacking.
Semiconductor Fundamentals (Part 3)
By George Novacek
In Part 2, George discussed devices built with one P-N junction, appropriately named diodes. In this article, he considers devices with more junctions. He starts with two and looks at the ubiquitous, three-terminal bipolar junction transistor, or BJT for short. George looks at the math, science and circuitry of these devices.
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