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23 Mar 2015


by Colin Jeffrey @ gizmag.com:

Before the dream of quantum computing is realized, a number of inherent problems must first be solved. One of these is the ability to maintain a stable memory system that overcomes the intrinsic instability of the basic unit of information in quantum computing – the quantum bit or “qubit”. To address this problem, Physicists working at the University of California Berkeley (UC Berkeley) claim to have created breakthrough circuitry that continuously self-checks for inaccuracies to consistently maintain the error-free status of the quantum memory.

First-ever quantum device that detects and corrects its own errors – [Link]

23 Mar 2015


We can control almost everything from our smartphone, tablet or smart watch these days, and thanks to the CleverLight™ Wi-Fi LED bulb, you can now control your lighting remotely without additional box.

We are pleased to announce that we have launched a new and unique product CleverLight™ Wi-Fi LED bulb.

Installation is as simple as removing your old bulb and installing CleverLight™ Wi-Fi LED bulb. Wall switch retains functionality.

In comparison to an incandescent bulb which lasts approximately 1,000 hours, CleverLight™ Wi-Fi LED bulb last at least 25,000 hours apiece at an estimated lifetime more than 20 years. With our LED technology 85 percent less power is needed than incandescent bulbs. CleverLight™ using up to 9 watts compared to a 60 watt incandescent bulb. Be smart with your energy.

To create the best user experience possible, we use Smart Config™ — a one-step and one-time process used to connect the CleverLight™ to a Wi-Fi network.
Just connect your Wi-Fi enabled phone or tablet to your access point, then enter your network’s password into the CleverLight™ App, and the setup process completes in less than thirty seconds.

CleverLight – Affordable Smart Wi-Fi LED Light Bulb – [Link]

23 Mar 2015

by w2aew @ youtube.com

The Vbe Multliplier circuit, also known as an Amplified Diode or Adjustable Diode, is a useful circuit that allows you to set a user desired voltage drop without using a series combination of diodes or zeners. This video describes and demonstrates how this circuit works, and shows a few applications where it is used. It is commonly used to set the bias on a low-impedance push-pull output stage of an amplifier. All transistors shows are typical general purpose devices like the 2N3904/2N3906. The scope is being used as a simple curve tracer in the first part of the video.

Basics of a Vbe Multiplier: what it is, how it works & where it is used – [Link]

23 Mar 2015

Teardown, Repair and Analysis of an HP 8562B 22GHz Spectrum Analyzer – [Link]

20 Mar 2015


With Sensirion humidity and temperature sensors you can be sure of what you measure. Moreover, now we´ll support your development by free samples.

Top-class calibrated humidity and temperature sensors Sensirion already gained many fans. Mainly thanks to a fact, that they´re not only “sensors” but a ready-made solution with a pre-amplifier, ADC and other circuits, which directly provide a final value in a digital form. That´s why it´s not necessary to solve input portion (noise, shielding, power supply, length of wires,…). Moreover, their long-term stability is verified in a praxis.

Features and usage of Sensirion sensors was introduced to you in many our articles. In the Sensirion portfolio can be found easily solderable types on a small PCB like for example SHT11(15) or SHT71 (75), as well as miniature types in SMT DFN packages like for example SHT21 (25) and also the new SHTC1. Small DFN package is practically impossible to solder manually, but it´s relatively easily manageable by means of a solder paste and a hot-air soldering station or ideally by a reflow in a hot-air oven.

Maybe, you´ve already noticed, that in many articles we also bring you a contest with a possibility to win free samples of a given component. We usually draw by lots 1-10 winners, which will directly receive free samples.

Still, if you´re seriously interested to try a given sample for a development of your (industrial) application, please contact us by e-mail. In many cases, we can provide you a given sample even if you wasn´t one of lucky winners of the contest.

Evaluate the Swiss precision for free! – [Link]

20 Mar 2015


by vaupell:

I am experimenting with RF and IR signals in various frequencies and had some trouble with the receivers and needed to see what kind of signal i was receiving. I cannot afford a real oscilloscope but i knew about the older Arduino oscilloscopes.

After trying many different versions of code and tutorials, I was unable to get a single one to work, and all the tutorials and guides around was 2-3 years old. Not sure if it is the IDE or the actual hardware that has changed in such a way that it didn’t work anymore.

I finally found a working oscilloscope from a Japanese website, (linked below) and a working TFT screen library, meaning i could read the various signals received.

A simple DIY Oscilloscope with Arduino Uno and Mega – [Link]

20 Mar 2015


by ohnitsch.net:

While trying to create a circuit that detects whether water is flowing through a pipe by measuring the vibration with a piezoelectric sensor, just to see what happens I taped the sensor around my finger and – to my surprise – got values that were a very noise-free representation of my heart rate!

Measuring Heart Rate With A Piezo – [Link]

20 Mar 2015


The dual low power amplifier built around TDA2822 8pin DIP. IC, it is mainly designed to use in portable players, radios and other building block project. A 3V supply can be used to drive headphones providing 20mW in 32 Ohms per channel, and a 12V power supply will provide 1W in 8 Ohm per channel for small loudspeakers.

Mini Stereo Audio Amplifier – [Link]

20 Mar 2015


The 6.5W Stereo Audio Amplifier project built around TDA2004 IC. The TDA2004 is a class B dual audio power amplifier, specifically designed for car radio applications etc.

6.5W Stereo Audio Amplifier – [Link]

20 Mar 2015


The project built around Philips TDA1521 IC, The project provides high quality audio 2X10W Audio output. The device is especially designed for mains fed applications, (e.g. Stereo TV Sound and Stereo Radio). The circuit designed for asymmetrical power supply systems.

10W Stereo Audio Amplifier – [Link]





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