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Comment: Is it legal to make code compatible alternatives? (Score 1) 631

by hamjudo (#48206101) Attached to: FTDI Reportedly Bricking Devices Using Competitors' Chips.
The fake chips that have FTDI stamped on the outside of the package are clearly misusing the FTDI trademark. On the other hand, those that don't cheat with the labels, and only use the string "FTDI" so they will inter-operate with existing software should be legal. I am not a lawyer. My opinion of what should be legal may not match what the courts rule as legal.

+ - FTDI is intentionally bricking devices using competitors' chips. ->

Submitted by janoc
janoc (699997) writes "It seems that FTDI has started an outright war on cloners of their popular USB bridge chips. At first the clones stopped working with the official drivers and now they are being intentionally bricked, rendering the device useless. The problem? These chips are incredibly popular and used in many consumer products. Are you sure yours doesn't contain a counterfeit one before you plug it in? What are you going to do if your device gets trashed?

The article is on Hackaday:"

Link to Original Source

+ - Smallest possible diamonds form ultra-thin nanothread->

Submitted by drcosquared
drcosquared (1720540) writes "Researchers in the Badding Lab at Penn State University have made diamond nanothreads through the compression of benzene molecules."These nanothreads promise extraordinary properties such as strength and stiffness higher than that of sp2 carbon nanotubes or conven tional high-strength polymers15. They may be the first member of a new class of ordered sp3 nanomaterials synthesized by kinetic control of high-pressure solid-state reactions." Nature Materials"
Link to Original Source

Comment: Re:Variation in online reviews (Score 3, Interesting) 131

by hamjudo (#47734233) Attached to: Ask Slashdot: Where Can I Find Good Replacement Batteries?
Sometimes the variations in reviews is due to variations in the product. Many years ago I worked in a brick and mortar store and resold electronics. I'd buy a small number of units from a supplier and test them. If they were good, I'd buy a bunch for resale. Assuming the customers didn't bring them back, I would buy more of the same, from the same vendor. Customers who were happy with units from the first few batches, were not at all happy with units from later batches.

I dissected customer returns. Again and again, the products in later shipments looked identical on the outside, but were "cost reduced" on the inside. For example, I would see empty places on the circuit boards where the filter capacitors were supposed to go. In one batch of one product, many of the units were dead on arrival, on the ones that worked when I unpacked them, the solder joints only lasted a few weeks. Once opened, I could see that the boards were either soldered at the wrong temperature, it was the wrong type of solder, or badly made solder. Every connection was visibly a cold solder joint. Either the factory had no quality control, or they ignored the quality control.

Other products looked identical inside and out, but based on the failure rate, the factory must have gotten a bad batch of one the components.

Even longer ago, I worked on a product that logged data to a Compact Flash memory card. It was an embedded product that needed to work across a wide temperature range, including in the winter in Minnesota. The big names like SanDisk would randomly swap component suppliers. Our largest customer saw less than a 2% failure rate, but that was way too much. We found a specialty supplier that charged 5 times as much, but they had a rigorous quality control process. They paid attention to the specifications. They tracked where parts came from, and promised that we would be able to test sample units if they needed to switch suppliers. Alas, the 2% failure rate from the earlier parts had already doomed that product line.

Comment: Re:This is not really new (Score 1) 60

by hamjudo (#47293619) Attached to: 3D-Printed Material Can Carry 160,000 Times Its Own Weight
The Fine article compares this type of lattice structure to the structure of the Eiffel Tower. They didn't claim anything more than being able to do it at a very fine scale, and to do it sufficiently precisely to get something that can support 160,000 times its one weight. They are just claiming refinements on centuries of engineering advances. The strength of well engineered 3D printed structures is still impressive. Even some printers that hobbyists can afford can beat out solid materials. It's only getting better.

Comment: It is all a matter of cost and size (Score 1) 101

by hamjudo (#46455495) Attached to: Intel Rolling Out 800Gbps Cables This Year

These will be used in data centers where it is common to have redundant systems connected with redundant cables, in order to maintain really high uptimes. Say a hypothetical system has a cluster which consists of 16 compute nodes and 2 storage nodes, Each of CPUserver01 through CPUserver16 will have two of these cables going to storageServerA, and two going to StorageServerB. For a total of 64 of these cables, for that one little compute cluster. Which would leave it an island, so of course there will be more network interfaces.

For this technology to get any market penetration, it will need to be cost effective at these bandwidths, and fit in the racks. Historically, Dense Wavelength Division Multiplexing, DWDM has been great at getting a lot of bandwidth on to a very long single strand (comparatively) inexpensive fiber, which allows in fiber signal amplification, and is the winner at going the distance, but not so good at being cost effective, or space efficient. These things, with the associated drivers should take up far less space inside the servers, and cost less, but they only will get 800Gbits in each direction, only go 300 meters, and use much more expensive (per kilometer of cable) 64 strand fiber.

Comment: Re:What's the killer app for flexible ICs? (Score 1) 15

by hamjudo (#46289277) Attached to: Hard Silicon Wafers Yield Flexible Electronics

Rigid silicon requires rigid interconnects. Flexible ICs allow flexible packaging, or different packaging. Instead of building from the printed circuit board up, build from the heatsink up. Use a precision pick and place system to glue the thin, wimpy, inexpensive silicon to the strong massive heatsink. Then mask on the solder balls. Then apply a thin, wimpy, inexpensive circuit "board". Attach all the old style surface mount components to the other side of the circuit "board". "Board" is in quotes because it would get all of its mechanical strength from heatsink. It might be so thin, it is no longer board like.

The big win here, is that one wafer is good for at least 5 sets of circuits. The lose is the grid of holes etched through the silicon as part of the pealing process. Assuming the grid of holes doesn't use up a significant portion of the surface area, the factory is getting close to 5 times as many devices out of each ingot of silicon.

Comment: It is a student design project (Score 1) 3

by hamjudo (#45971351) Attached to: Revolutionary Scuba Mask Creates Breathable Oxygen Underwater On Its Own
You can see the student's portfolio on his website: . He probably got a good grade. The case looks nice, if not plausible. The design for the guts of the device is lacking. He got the biology wrong, divers don't want pure oxygen. They need a mixture of gasses. The machine would have to process a whole lot of water to get enough oxygen to support a human. This means a whole lot of water would have to continuously flow through the device. Moving that much water takes a lot of energy.

Comment: Real time double entry bookkeeping (Score 1) 303

by hamjudo (#45806303) Attached to: Website Checkout Glitches: Two Very Different Corporate Responses
A few trading firms have learned to have a second system that monitors transactions to keep tabs on profit and loss. If the things swing out of the expected range, it is time to have a human look at the situation. If things get really out of hand, it is time to rate limit transactions, or halt them out right. Sudden extreme profits usually indicates a data entry error on your system, not that the rest of the market has gotten really stupid.

Most inventory systems have a way to track cost of goods, age of inventory, and expected profit margin. Eventually retailers will start filling in those details, and tracking them, so they can notice when something goes expensively wrong.

Comment: I've got a Qi charger (Score 1) 223

by hamjudo (#45483061) Attached to: Google Nexus Gets Wireless Charger
It works even if my Nexus 5 is more than 5 mm above the charging pad. That is many orders of magnitude less than the range for most wireless communication technologies.

The useful features are

  1. no connector to wear out,
  2. alignment is simple.
  3. The USB/thinport connector is available for other uses. (More of a theoretical benefit, as I don't use the USB port for anything, but I could if I wanted to. I've got the cable, I could even plug in an SD card reader.)

We don't know one millionth of one percent about anything.