bravo22

28 ms·

241.
by bravo22 11y ago
Right. That makes sense too!
242.
by bravo22 11y ago
That's for a different reason. Let's say you have 4 models of a chip, some with more internal RAM & Flash some with less and some with a couple of peripherals and features, and some with less. It is far less expensive to desig
243.
by bravo22 11y ago
I think it is a combination of both. But even then I can't imagine profit of more than $1-$2 per board AT BEST.
244.
by bravo22 11y ago
WiFi + BLE combo would be about $4 in volume.
245.
by bravo22 11y ago
It looks like R8 which is based on A13, most likely PoP because I don't see a DRAM or NAND flash in their pic. PCB might sound high, but it isn't standard 8/8/10 spec PCB. It will have smaller holes and tighter tolerance
246.
by bravo22 11y ago
Shenzen pricing, 6 layer board with 8 mils holes, and 4 mil clearance. ENIG finish. 2.3"x3.3" Looking at the picture of their board the package is most likely 0.65 or -- possibly 0.4 -- pitch which means much laser drilled holes.
247.
by bravo22 11y ago
As do I. They might be able to pull it off with discounts from their suppliers but I imagine it is difficult to build a sustainable business around that price. Even assuming 20K volumes: Current market price for 4GB of flash is about $2.50[
248.
by bravo22 11y ago
Can you point to one instance where GS argues that it was the secret algorithm? They merely say code related to the trading platform. Lewis had access to the source code because it is presented as evidence in a trial and therefore matter of
249.
by bravo22 11y ago
To address his lawyer's admission... as I said modified open-source code becomes proprietary so the lawyer isn't wrong. That is why he said that he violated the confidentiality agreement but that isn't the same as stealing tr
250.
by bravo22 11y ago
This does not contradict what Lewis writes or what I mentioned on my first post. The "proprietary, custom-built trading system." has a lot of infrastructure code to handle the incoming volume, ensure nothing gets dropped, and trad
251.
by bravo22 11y ago
The Second Circuit is not an expert on software. It is an expert in law and modified open source code becomes proprietary code in eyes of the law for the purposes of GS employment agreement. They're not parsing how GPL or some other li
252.
by bravo22 11y ago
I don't think it is well established that we he took was an algorithm or any such thing. Michael Lewis wrote a big article in Vanity Fair which I suggest you look at. He gathered a number of experts who looked at the evidence presented
253.
by bravo22 11y ago
The article is only concerned with unit costs, not overall cost with various amortizations built in.
254.
by bravo22 12y ago
FPGAs ARE ASICs :) Just a special case of ASICs. The fabrication and processes are the same. There is no advantage of one over the other. FPGAs are more vulnerable in some ways than ASICs because someone could steal your design and duplic
255.
by bravo22 12y ago
I fully support the spirit of what you're doing btw. I hope you don't take my comments as somehow dumping on your work ;). What is "crappy" about Xilinx tools aside from the UI? I'm genuinely curious. I don't t
256.
by bravo22 12y ago
SDR uses orders of magnitude more power than an ASIC implementation which is why no one uses them except for base stations -- such as cell towers. FPGA based design for crypto would have the same timing attack as CPU. It can be worked aroun
257.
by bravo22 12y ago
FPGA/ASIC interchangeable for the purpose of verification. There are two types of verification: A) does the post synthesis gate match my RTL B) Does my RTL do what I want it to do, i.e. matches the spec. For B you have a whole host of
258.
by bravo22 12y ago
Often times there are clever optimizations and work around that have to be implemented to work around internal limitations that they don't publish so as not to give their competitor marketing advantages. What we should be pushing for a
259.
by bravo22 12y ago
I agree that it isn't suitable for hobbyists. For what it is worth, length matching is a function of the layout. Impedance matching doesn't require any crazy manufacturing technique, just choosing the correct pre-preg type/th
260.
by bravo22 12y ago
There are no universal Schematic/PCB Design files. It is actually very common to provide only a PDF as reference. Anyone who is going through the trouble of trying to make these should have the basic skills necessary to do a decent lay
261.
by bravo22 12y ago
I agree. It was very poor project planning. The multiple radio modules doesn't make sense for starters and in fact all but laser could easily be built into the current design for little cost (PIR, Light intensity, sound intensity). As
262.
by bravo22 12y ago
Perhaps he should put his vendor quotations online, along with his BOM choices? I design products for a living and I'm finding it hard to believe that the component BOM for this would be anything over $15. Additionally, their case is a
263.
by bravo22 12y ago
I'm not agreeing or disagreeing about this being snake oil... but how do you think phased-array and beam forming work if not by controlling phase delays between antennas so as to create constructive and destructive interference at a de
264.
by bravo22 12y ago
it was the watch display case the author talks about later.
265.
by bravo22 12y ago
Kits and test equipment are generally exempted from FCC, if they are unintentional radiators [1]. Unintentional radiators don't get certified or get an FCC ID, instead it is based on self declaration. You should do the test (a couple o
266.
by bravo22 12y ago
That's a great tip! How do you ask "nicely"? Is there a rep you contact or contact just general billing/support?
267.
by bravo22 12y ago
I think there is a large difference. It requires a different skillset to manufacture 1000 of something that consumers will buy vs manufacturing customer touch points that are owned, and serviced by the company. Your manufacturing pipeline,
268.
by bravo22 12y ago
Maybe not their IT service, but their logistics and building operations certainly are. I agree with your points regarding BufferBox, but I wouldn't say they are a hardware company producing a hardware product that you can sell to a cus
269.
by bravo22 12y ago
Agreed. That is a good one. I was thinking of more complex board, with non-standard finish and soldermask. Even Pentalogix in Oregon offers 2-4 layer boards for about $25-$40 in two or three day turns.
270.
by bravo22 12y ago
If your board is that simple then why not use a perfboard or a breadboard!? You can get two layer boards for $25-$40 depending on size in two three days, in US from many sources such as Pentalogix.

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