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14 Feb 2015

In this world exclusive episode, Shahriar visits Teledyne LeCroy to take a close look at the operation, teardown and experiments with the LabMaster 10-100zi, 100GHz simultaneous bandwidth, 240GS/s real-time oscilloscope. This instrument provides either a single 100GHz channel, or two 33GHz and one 65GHz digitizing channels. The instrument uses a frequency interleaving technique invented and implemented at LeCroy.

The block diagram and the theory of operation of the scope is presented. This includes the architecture of the 4x80GS/s ADCs and the triple frequency interleaving system. The teardown of the scope includes a close look at the ADC platform, the dual frequency interleaving (65GHz operation) and the triple frequency interleaving (100GHz operation). The experiments with the scope demonstrate the instrument’s capability to digitize signals up 100GHz using the beat frequency of two non-coherent lasers. The scope is also used to capture a 4pS rise time pulse from a femtosecond laser pulse system and a high-speed photo detector.

A complete factory tour is also presented where Teledyne LeCroy assembles all their oscilloscope products right here in the USA.

Experiments and Teardown of the Teledyne LeCroy LabMaster 10-100zi 100GHz, 240GS/s Oscilloscope - [Link]

14 Feb 2015

by Henry Tonoyan @ htonoyan.blogspot.gr:

Last week I had the idea to create a last-minute valentine’s day gift for my girlfriend. I had a bunch of WS2812 LEDs from my previous endeavors and decided to make a big LED heart. These are a great choice because of the very minimal amount of components necessary: no I/O expanders, driving transistors or ICs necessary. Plus you just need one I/O line from your microcontroller to drive them.

Since they run off 5V, I planned to create a board that is powered from a wall-wart power supply. That way the board doesn’t even need a voltage regulator on it. I chose to use an ATMega48 because I have several from previous projects.

A Valentine’s Day Surprise - [Link]

13 Feb 2015

The Twin-T narrow-band notch filter has an RC network that look like twin T’s.  An effective attenuation at a given frequency can be obtained with the Twin-T design.  The Q factor for this passive filter design  is about .25; to get a larger Q factor, an active design is necessary.  The Twin-T design works by phase shifting the input 180 degrees out of phase in the legs of the circuit and adding them again at the output to cancel at the desired frequency.

Twin-T Notch Filter - [Link]

13 Feb 2015

TPS62360

By Chris Glaser @ ti.com:

Especially for switch-mode power supplies (SMPSs), the printed circuit board (PCB) layout is a critical but often under appreciated step in achieving proper performance and reliability. Errors in the PCB layout cause a variety of misbehaviors including poor output voltage regulation, switching jitter, and even device failure. Issues like these should be avoided at all costs, since fixing them usually requires a PCB design modification. However, these pitfalls are easily circumvented if time and thought are spent during the PCB layout process before the first PCBs are ever ordered. This article presents five simple steps to ensure that your next step-down converter’s PCB layout is robust and ready for prototyping.

Five steps to a great PCB layout for a step-down converter - [Link]


13 Feb 2015

obr1662_1

Whether it´s a prototype or a whole production batch of PCBs, Kontakt PCC cleaner will manage any residues after soldering.

Manual intervention to a PCB is usually always visible. With modern „No-clean“ fluxes it´s not that obvious as in the past. But still it doesn´t make resulting look of a PCB better. However, probably more important is the fact, that soldering residues are a potential risk, especially in humid environment – as they may cause a corrosion and leakage currents.

A PCB can be cleaned by various solvents (often also ecological ones – water based), but some residues are often simply too persistent … That´s why we need a solvent, which is relatively “as strong as possible, but safe for solder resist, marking and components with plastic packages at the same time.
Spray Kontakt PCC is developed specially for these purposes, what´s raised by a fact, that it´s equipped by application brush, helpful for a fast dissolving of thick layers. To maintain ESD safety, it´s necessary to moisten the brush by short pressing the valve before touching a PCB.

Kontakt PCC dissolves all types of fluxes without leaving residues. When cleaning thick layers, it´s necessary to wipe wet board with a paper tissue or similar. In result we gain perfectly clean PCBs resistant to leakage currents formation. Naturally, to obtain a long-term protection it´s advisable to use some of protective coatings like for example Plastik 70, Urethan 71 or Silisol 73 and other. Thanks to a strong effect, Kontakt PCC is also suitable for cleaning of various connectors, sockets, contacts, commutators of electric motors, …

Kontakt PCC is safe for majority of plastics except a few very sensitive types (e.g. polystyrene, polycarbonate). If a whitish coating appears after cleaning, usually it means, that the board was already treated by a protective coating (lacquer) before. In this case it´s possible to restore perfect look by application the Plastik 70.

Even your PCBs can look professionally - [Link]

13 Feb 2015

intel_galileo2_arduino_linux_tut

by MikeArduino @ communities.intel.com:

One might mistakenly think that the Intel® Galileo Gen 2 as only an advanced, more powerful version of Arduino Uno that happens to be layered on top of a Linux system.

There’s actually more to it than that and hopefully, this tutorial will show the bigger and more complex view of the Linux core underneath.

Tutorial on getting started with Intel Galileo Gen2 - [Link]

13 Feb 2015

unnamed

by R. Colin Johnson @ eetimes.com:

The world’s first microelectromechanical system (MEMS) spectrometer on-a-chip was shown today at at Photonics West (San Francisco, February 10-12) by Si-Ware Systems (SWS, Cairo, Egypt with offices in La Canada, Calif.) Instead of transporting materials across sometimes great distances to be analyzed with a normal bench-top spectrometer, Si-Ware’s MEMS-powered spectrometer fits in the palm of your hand and thus can be taken to the material to be analyzed.

“Spectrometers are usually bench sized, so your have to take the object to the bench, but now with our MEMS sized you can can take the spectrometer to the object,” said executive vice president, worldwide marketing and business development of Si-Ware, Scott Smyser.

World’s 1st Spectrometer On-a-Chip - [Link]

13 Feb 2015

FP43HPRI1SN6AS7.LARGE

by electronichamsters @ instructables.com:

A few years ago, I became a dog owner for the first time. I didn’t like leaving Cody in the kennel alone all day. I had a webcam on him, but I couldn’t watch it all day long. What if he was in some kind of distress? What if there was a emergency at the house, like a fire?

I wanted some way of getting an immediate email notification when he barks, or when something bad happens. So reading lead to tinkering, and tinkering eventually lead to making this full blown home automation system based on open source hardware (Arduino) and open source software (OpenHAB). I know I know, yet another “Arduino Home Automation” project, right? But I promise I’m not going to turn on a light from a smart phone. I’m more focused on extensive networked sensors, timely alerts, and aesthetically appealing presentation of events.

Uber Home Automation w/ Arduino & Pi - [Link]

12 Feb 2015

42020-Switch-Press_WEB

The UltraCMOS® PE42020 Integrates RF, Digital and Analog Functions in a Monolithic Die to Preserve Signal Integrity From DC to 8 GHz

Peregrine Semiconductor announces the availability of the UltraCMOS® PE42020, the industry’s first and only RF integrated switch to operate at true DC, zero Hz. This True DC RF switch features high power handling and maintains excellent RF performance and linearity from DC through 8000 MHz. A reliable alternative to problematic mechanical relays and micro-electro-mechanical systems (MEMS), the PE42020 is ideal for test-and-measurement (T&M) and automated-test-equipment (ATE) applications.

“For the first time, an integrated RF switch can operate at DC and truly cover the signal over the entire frequency spectrum,” says Kinana Hussain, Peregrine’s senior manager of marketing. “Until now, only mechanical relays and MEMS switches allowed DC pass through, and these products are plagued with reliability issues and lack of integration. Today’s release of the UltraCMOS PE42020 is another example of Peregrine solving the RF industry’s biggest challenges.”

Peregrine Semiconductor Ships Industry’s First True DC Switch - [Link]

12 Feb 2015

finshed_pcb

by acidbourbon @ acidbourbon.wordpress.com:

Soon after I played around with some simple sequencers and multiplexers to generate more complex sound patterns. I thought it would be cool to have a device to gate oscillators or switch multiplexers with a random sequence. But the the output should change at a defined rate. Can we build a simple random pattern/number generator that works synchronized with an external clock signal? I believe so.

Clocked 8-bit random pattern generator for CMOS synth - [Link]



 
 
 

 

 

 

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