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20 Oct 2014


by jollifactory @ instructables.com:

We have created two game project instructables so far using the jolliFactory Bi-color LED Matrix Driver Module D.I.Y kits we designed. This LED Matrix module is designed to be chain-able so you may daisy-chain the modules together to the number of modules you need to suit your project.

Arduino based Bi-color LED Matrix Pong Game - [Link]

20 Oct 2014


An app note on Gamma-photon radiation detector (PDF) by Maxim:

A PIN photodiode, four low-noise op amps and a comparator are used to detect individual photons of gamma radiation. The schematic, design considerations and component selection are discussed.


Gamma-photon radiation detector - [Link]

19 Oct 2014


Professionals, school laboratories and amateurs can now gain this new, extra affordable digital MSO oscilloscope in a limited offer.

Probably you may have noticed, that company Hameg became a member of Rohde&Schwarz group and new oscilloscopes already carry only an R&S logo. However the name of series HMO remains, which represents for several years products with an excellent price/ performance ratio. This time a new member was added to the HMO series – HMO1002, further decreasing a price level while maintaining many features, which usually can´t be found in this price level. For a standard recommended retail price of 798 Euro it provides really a lot.
Moreover, now we offer you a special limited offer in which you can purchase this oscilloscope for only 610 Eur. The offer is valid for the first five pieces and only until stock sell-out.

The 2-channel 2×50 MHz oscilloscope offers a full MSO functionality and after buying an external logic probe HO3508, we´re able to watch analog and digital signals on one screen at once (ideal for measuring AD/DA converters and similar). With a 1Gsample/s sample rate (512Mhz/ channel), 128k FFT, function generator and various math functions, it provides wide possibilities for analysis of circuits. Unique in this class is a 50 MBit/s arbitrary generator, allowing to create 4 bits wide and 2k long custom samples. At the same time, this generator can be set for example in a way to obtain 25 MHz signal (clock) on its output.

Another unique in this price level is a possibility to precisely measure even weak signals thanks to a real sensitivity of 1 mV/division.
HMO1002 is also available in 2×70 MHz and 2×100 MHz versions, but perhaps the mos interesting is a possibility to upgrade the basic type (with 2×50 MHz inputs) anytime later to 70Mhz or 100MHz bandwidth by means of SW Vouchers.
Detailed information will provide you the HMO1002 brochure.

It´s hard to resist to R&S HMO1002 oscilloscope for 610 Euro - [Link]

19 Oct 2014

Who is the winner of umodule demoboard from Linear technology? In addition to getting to know the winner, you can also watch the video record from webinar…

Linear Technology’s family of DC/DC Module products simplifies your analog design. By integrating the DC/DC controller, power switches, magnetic, and a modest amount of capacitance, uModules power products will save precious space on the PCB and reduce the solution weight, development time, BOM qualification and procurement effort. You could find this out during webinar about Linear technology modules.From all of those who filled in our questionnaire after webinar we have drawn winner of the uModulu demoboard. The winner is František Bulko from EVPÚ a.s.
Congratulations to the winner.

Your way to simple and efficient power supply design with Linear Technology - [Link]

18 Oct 2014
High-energy light is absorbed by a special organic coating that produces pairs of triplets that can be efficiently absorbed  by underlying inorganic solar cells.

High-energy light is absorbed by a special organic coating that produces pairs of triplets that can be efficiently absorbed
by underlying inorganic solar cells.R. 

Colin Johnson @ nextgenlog.blogspot.com:

Hybrid solar cells that harvest all of the suns energy, instead of just a few narrow bands, could transform the energy economies worldwide: R. Colin Johnson @EETimes

Hybrid Solar Cells Promise 95% Efficiency - [Link]

18 Oct 2014


by ajoyraman @ instructables.com:

USB connected TI TMS320F28027 based ZRLC Tweezers with

Most Digital multi-meters measure Resistance and Capacitance and LC-meters can measure Inductance and Capacitance. Presented here is a ZRLC meter which can measure Resistance, Capacitance, Inductance and Complex Impedance.

The hardware is built around a TMS320F28027 micro-controller an 8-port-analog-switch ADG714 from analog-devices and a Microchip rail-to-rail dual operational-amplifier MCP6022.


USB Tweezers for ZRLC measurements - [Link]

18 Oct 2014

by TheSignalPathBlog @ youtube.com:

In this episode Shahriar reviews the new Keithley 2450 Source Measure Unit (SMU). This model, which is the successor to the widely adopted Keithley 2400, offers performance improvements as well as a brand new interface platform with multi-point touch screen.

The review demonstrated the instruments GUI, scripting capabilities through the TSP interface and various performance parameters. Furthermore the scripting features are used to measure super capacitor capacity, the performance of a wireless charging system, characterization of optoelectronic components and semiconductor elements.

Keithley 2450 Source Measure Unit (SMU) Review and Experiments - [Link]

18 Oct 2014

by EEVblog @ youtube.com:

Dave tears down the new US$399 Rigol 4 channel 50MHz DS1054Z oscilloscope.
How can they get such incredible value for the price?

EEVblog #674 – Rigol DS1054Z Teardown - [Link]

17 Oct 2014


by ohwr.org:

F*watch is a fully open electronic watch project featuring an integrated GPS receiver.
The development started at CERN as an after-work project to make a special present for a retiring colleague who likes hiking and timing.
The full design (electronics, mechanics and software) is available under free licenses and the design is exclusively made with free tools.

F*watch – a fully open electronic watch - [Link]

17 Oct 2014


ajoyraman posted a tutorial on how to make a DIY USB-matchbox oscilloscope, an instructable here:

In order to economize on the cost of an enclosure while still providing an aesthetic unit the Aj_Scope2 is enclosed in a large size cardboard matchbox enclosure.
The USB connection to the PC is on one end while the Audio-Jack for the signals to be monitored is on the other.
A ‘Busy’ LED is provided on one corner at the top and a ‘Reset’ switch is provided diagonally opposite.
The ‘Reset’ switch provides a restart of the micro-controller is the worst-case of hang-up. This typically occurs when the operator selects a trigger threshold which is out of limits with respect to the waveform being observed. If the Aj_Scope2 is operated correctly this switch is seldom used.


DIY USB-Oscilloscope in a matchbox - [Link]





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