Probably, some of you have tried buying cool but cheap products from Ebay. Like some of you, I also have bought items from Ebay several times already. One of the items that I got from Ebay is a small ENC28J60 based ethernet module.
As you can see from the image above, the ENC28J60 module is very small. The PCB is more or less one-inch square which is almost as small as the included ethernet jack.
Simple Sensor Webserver – [Link]
A logic analyzer is a powerful debugging tool for capturing many digital signals at once and analyzing their timing relationships. Raj from Embedded Lab has posted a new tutorial that provides a quick overview of a logic analyzer tool and its uses in troubleshooting problems arising from timing violations and transients on microcontroller buses. He used the SCANALOGIC-2 educational kit from IKALOGIC to illustrate the concept of logic analyzer.
Learning Logic analyzer basics using SCANALOGIC-2 educational kit – [Link]
Pittsford, NY, USA: Saelig Company, Inc. (www.saelig.com) has introduced the ABI BoardMaster 8000 PLUS –a unique, versatile, self-contained, and easy-to-use PCB test system. The BoardMaster 8000 Plus is a comprehensive set of test instruments, complete with built-in PC, for testing and fault-finding on almost any kind of PCB. Incorporating a full range of test instruments in one compact box and offering a variety of available test methods, the BoardMaster 8000 PLUS provides a cost-effective standalone solution for electronics faultfinding across a wide range of industries.
BoardMaster 8000 PLUS is an integrated package of high specification instrumentation controlled by sophisticated but easy to use software. The hardware is installed in a rugged transportable case that also contains a high-specification, Windows™ PC. The BoardMaster 8000 PLUS is based on a modular system which can be customized for specific applications, and its software can be configured to guide users step-by-step through a test procedure, with custom-annotated picture images, instructions, and attached datasheets to give quick Pass/Fail results. This is much faster and more economical than using traditional oscilloscope and metering and other bench test methods. Read the rest of this entry »
Functionality, Innovation and Style, are the benchmarks of the new device series
Miami, Florida, January 22 2013 – T&M Atlantic today announced that There is a new addition to AKTAKOMs handheld oscilloscopes-DMMs, a new device series dual channel models ADS-4062 and ADS-4102 with a bandwidth of 60 MHz and 100 MHz respectively. AKTAKOM new digital oscilloscopes-multimeters have maximum real time sampling rate of 1 GSa/s (500 mSa/s per channel) and the deepest Functionality of these new devices is on the same level as benchtop oscilloscopes and in features technology that is inherent in digital oscilloscopes of world-known brands. Similarly to AKTAKOM ADS-2022, ADS-2042M, ADS-2062, ADS-2062M, ADS-2072, ADS-2072M, ADS-2102, ADS-2102M, ADS-2152, ADS-2152M, ADS-2202 benchtop oscilloscopes ADS-4062 and ADS-4102 models have wider synchronization capabilities. They include: edge trigger, video signal trigger, pulse width trigger, slope trigger, as well as alternative trigger to watch nonsynchronous signals. Read the rest of this entry »
Sam DeRose writes:
Last week in my college physics lab we got to use these variable resistance ‘boxes’. They had two inputs and six dials, and could generate one million different resistances across the two inputs. I knew I had to have one, and why not make it myself? This tutorial demonstrates how to build one for yourself for pretty cheap.
Make a Variable Resistor with 1 Million Settings - [Link]
Fully autonomous processors add simple, utility-grade energy measurement and diagnostics to existing designs.
San Jose, CA—January 16, 2013—Maxim Integrated Products, Inc. (NASDAQ: MXIM) today announced that it is now sampling the 78M6610+PSU/78M6610+LMU single-phase energy-measurement processors. These processors are an energy-measurement subsystem in a single chip. They provide simple utility-grade sensing and diagnostics for existing designs without the traditional cost of a utility meter system-on-chip. Both devices contain unique firmware to meet end application requirements. The 78M6610+PSU is specifically designed for real-time monitoring of data centers, servers, and telecom and data equipment, while the 78M6610+LMU is a more general-purpose solution for applications such as white-good appliances, smart plugs, EV chargers, and solar inverters.
The 78M6610 processors enable energy-measurement functionality while reducing both manufacturing costs and time to market. Energy-measurement solutions traditionally required the use of an additional microcontroller, which adds significant design cost and months of development time. The 78M6610 allow users to conveniently add a complete energy meter to an already existing design without significant cost or redesign. Additionally, the processors’ flexible measurement and host interfaces allow for easy integration into any system.
Single-Phase Energy-Measurement Processors Accurately Monitor Power at a Fraction of the Cost - [Link]
Paulo Oliveira writes:
An adjustable power load is a piece of test equipment that often comes handy in the development of a certain electronics projects. For example, when you are building a power supply, it will come a time when you need to “simulate” a load to see how well your design performs as the load varies. Adding power resistors to the output can sometimes do in a pinch, but often you will not have the right resistor value handy with the right power rating for the test. This is where an adjustable electronic load comes handy. In this article, I’ll show how you can build one using common components available to the electronics hobbyist.
Building an Adjustable Constant Current Load - [Link]
Check out how to build a high speed oscilloscope probe that measures 125MHz signals better than commercial probes. Paulo Oliveira writes: [via]
Some years ago, I learned some valuable lessons about probing high-speed signals. Somehow, mistakes have a way to sticking in your mind and we call them “experience”. Most modern oscilloscopes come with a “high-bandwidth” 10X passive probe. Figure 1 shows the venerable Tektronix P6139, 500 MHz, 8pF probe. At first glance, a “500 MHz probe” might seem adequate to probe say, a 125 MHz clock signal right? Wrong… We will see why with a practical example showing the issues you run into when trying to probe such a signal. Later in the article, I’ll also show how a surprisingly simple and affordable DIY passive probe can outperform even the best 10X passive probes for this particular application.
Homebrew highspeed lo-Z scope probe – [Link]
Here is a PDF document from Linear Technology, featuring current sense circuits for different applications, including High side, low side, level shifting, high and low voltage, fault sensing, etc: [via]
Sensing and/or controlling current flow is a fundamental requirement in many electronics systems, and the techniques to do so are as diverse as the applications them-selves. This Application Note compiles solutions to current sensing problems and organizes the solutions by general application type. These circuits have been culled from a variety of Linear Technology documents.
Current sense circuit collection - [Link]
Re:load is an adjustable constant current load with the following properties:
- No external power supply required – powered by the device under test
- Wide range of input voltages, from 3.3 volts to 32 volts
- Adjustable load from 0 to 3.5 amps
- Up to 14 watts power dissipation (with design heatsink)
- Virtually indestructable: The power FET, BTS117, has built in overtemp, ESD, and overcurrent protection
- Load remains constant under different input voltages – 40 milliamp variation over input voltage range
- Screw terminal and banana plug footprints
- Low BoM cost, and easy to solder thru-hole parts
- Test points for reading current with a voltmeter
A simple, flexible adjustable dummy load - [Link]