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10 Jul 2014

obr1554_1

There´s only one original, even though with a fake, it´s possible to “gain” also something unwanted – hours of debugging and costs for exchange.

Copying of products and components is perhaps as old as an industrial production is. Logically – it´s easier to jump up to a “running train” (to copy a renowned product) than to develop something new. Everyone, who develops an electronic device probably can confirm, that it´s demanding and expensive. Similarly it´s also at development of chips. Well known and widely used chips for a USB interface . from company FTDI belong to the most popular on the market. No wonder, that it´s fakes appeared on the market, with the same appearance as an original (on the first sight). Despite the fact, that the price of the FT232RL chip is relatively very affordable, a vision of a cheaper purchase was certainly attractive though expensively paid at the end.

On the enclosed photo, there´s an original on the left side and the fake on the right side. It´s visible, that the original has a laser engraved marking, while the fake has it only printed. But that wouldn´t be a problem… Fake worked so-so well until the time, when FTDI upgraded drivers with a utility able to detect fake products. In case of fake, the USB communication fails (sends only zeroes).

On the enclosed photo, there´s an original on the left side and the fake on the right side. It´s visible, that the original has a laser engraved marking, while the fake has it only printed. But that wouldn´t be a problem… Fake worked so-so well until the time, when FTDI upgraded drivers with a utility able to detect fake products. In case of fake, the USB communication fails (sends only zeroes).

The result is clear in this case – exchange of non-working fakes from target devices (from customers! is significantly more expensive that a usage of an original would be. And how to be certain about the authenticity of the component? – by a purchase from an authorized distributor. SOS electronic is already for many years an authorized distributor of FTDI with a close cooperation and an above-standard technical support.

Be aware of the FTDI chips fakes - [Link]

10 Jul 2014

20140604_234359-600x450

Chris Holden of NerdClub shares his tips on how he successfully program an ATMega128:

Finally got an ATMega128 chip coded and programmed successfully. The great news is it doesn’t require Arduino. The even better news is, we can use Oshonsoft to write the code! Yay.

[via]

Programming an ATMega128 - [Link]

9 Jul 2014

F9Z1SYQHX42QUO2.MEDIUM

Nikus @ instructables.com writes:

I will show you how to build a bike speedometer. It shows your speed, the average speed,the temperature, the trip time and the total distance. You can change it using the button. Additionally, the speed is shown on a tachometer. I built it because I like building new things, I have not found anything like this on the Internet so I want to show you how to build a good speedometer as the one on my bike is not as cool as I want :) . So let’s get started.

DIY bike tachometer - [Link]

9 Jul 2014

sand-lithium-ion-battery

By Darren Quick @ gizmag.com:

Conventional lithium-ion batteries rely on anodes made of graphite, but it is widely believed that the performance of this material has reached its zenith, prompting researchers to look at possible replacements. Much of the focus has been on nanoscale silicon, but it remains difficult to produce in large quantities and usually degrades quickly. Researchers at the University of California, Riverside have overcome these problems by developing a lithium-ion battery anode using sand.

Sand-based anode triples lithium-ion battery performance - [Link]


9 Jul 2014

oled_case

Jared Sanson @ jared.geek.nz writes:

So it’s been a while since I last posted about my OLED watch, and I’ve done a lot of work on it! (And also broke it multiple times)

It’s taken me a lot of work to get this far, and I developed EVERYTHING from the ground up. The electronics design, the PCB layout, the RTOS and firmware drivers, the graphics engine, the user-mode app code, and even USB communications apps. I’ve used C, C#, and Python extensively in this project, and Altium Designer for the schematic and PCB.

Overall it has been an awesome learning experience, and if I was to make another one I would do a lot of things differently!

OLED Watch Is Alive! - [Link]

9 Jul 2014

WallLight-DSO

by Daniel @ nupo-artworks.de :

I started this project 2 days before we went to France for a 2 week holiday but since this is a really quick project the lamp worked fine after 2 days. Now when we came back I gave it the last touches and finished some bugs in the software.

Initially this lamp should be a replacement for a lamp in our living room but I was way too greedy with the WS2812B LEDs. Eventually, the lamp wasn’t bright enough so I’m going to mount it now in the sleeping room as one of those morning, sun imitating lamps. As a controller I’m going to use a Raspberry PI with a node script that will also control some other devices in my house like my Wall Clock.

IKEA ceiling lamp LED modification - [Link]

9 Jul 2014

PWM_controller

Ondrej Karas of DoItWireless writes:

This is simple illustration how to build easy PWM LED control with IQRF TR module and a few other components.

This device is powered from 12V/6A DC power supply and can power up to 5m of LED strip. This device can be controlled via RF, buttons or potentiometer. RF controlling is compatible with remote control device RC-04 with low battery signalizing – fast 3 time LED blinking.

RF PWM LED control - [Link]

9 Jul 2014

 

3350

by linear.com:

The LTC3350 is a supercapacitor charger and backup controller IC that includes all of the features necessary to provide a complete, standalone capacitor-based backup power solution. Many applications require reliable short-term uninterrupted power in the event of a main power failure. Examples include data backup for solid state drives (SSDs) and nonvolatile dual in-line memory modules (NVDIMMs), power fail alarms in medical and industrial applications, as well as a host of other “dying gasp” power fail indicators. The LTC3350 provides all PowerPath control, capacitor stack charging and balancing, and capacitor health monitoring to ensure that the backup system is capable of reliable operation.

LTC3350 – High Current Supercapacitor Backup Controller and System Monitor - [Link]

 

8 Jul 2014

yeeemif1

by Chang Fei Yee @ edn.com:

This paper discusses the essential steps taken to achieve a low-EMI prototype before conducting compliance tests in an anechoic chamber. These steps include electronic circuit design for minimal radiation, and pre-compliance inspections. The pre-compliance inspections include simulated EMI analysis of a printed circuit board (PCB) layout model using 3DEM software, and a near-field EM scan of the prototype PCB using a spectrum analyzer (SA). Success is confirmed by anechoic testing.

Build low-EMI prototypes: The essentials - [Link]

8 Jul 2014

love-cropped

By Sergey Feingold @ makezine.com:

For makers, engineers, and DIY enthusiasts, Shenzen, China is a bit of a dream world. Once you get past the shoddy internet and questionable origin of the components you buy in the markets, you realize just how quickly and easily you can get almost anything done. For about $100 you can get a couple dozen 4-layer PCBs and a stainless steel stencil. For another $50 you can get it in 2 days. That’s seriously cheap, and the game changes when you have such ready access to fast, cheap manufacturing. The electronics market puts Wal-Mart to shame, and you can’t walk 20 feet without bumping into someone carrying a reel of components or pushing a cart full of capacitors. I was there with Lavie Sak, my co-founder for Shot Stats, makers of Challenger, a tennis swing tracking device. We were excited and overwhelmed by this new place and it seemed like anything was possible.

Prototyping a Tennis-Tracking Device in Shenzen: A Lesson - [Link]



 
 
 

 

 

 

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