Viewing profile — miratrix

I'm assuming you're talking about Platform / BSP side of the ugliness. You have to look at the lineage of how things evolved to the current state - on the PC ecosystem, everything …

On the grid tied solar inverter front - the spec sheet says the battery voltage is 350~450 V, so we're looking at 108 lithium ion cells (25 x 18650 cells?) at 400 VDC nominal. This…

Transponders have to be turned off while you're at the airport and while the plane's being serviced on ground. I think 777 has 2 transponders, so you also need the ability switch f…

Wifi scanning is also pretty terrible for power consumption as you found out. If you are on Android, my guess is that your phone was set to be connected to Wifi during sleep. You c…

The difference between DCH (the full-on high power state) and PCH (the lowest power, waiting-for-paging state) is about 2-orders of magnitude. Last time I measured, it was about ~1…

The problem with $30k Tesla in 2018 that doesn't differ too much from Nissan Leaf... is that we already have the 2013 Nissan Leaf. :-)

I worked on electric vehicle space in early 2000s - there are many improvements for sure since then, but in the battery technology, not much has changed. 10 years ago, top of the l…

The problem is that once you get down to ~$30k pure electric car, you're going to end up something that looks like the Nissan Leaf, even 5 years from now. There is no magical Tesla…

CPU is rather a small power of total platform power consumption these days. Switching x86 to ARM won't magically get you from 5 to 50 hours of active usage. If you compare MacBook …

I think there will be performance gains to be had, especially in applications where concurrency has been 'bolted on' (akin to the Big Kernel Lock). However, I think what makes this…

"Apple typically asks suppliers to specify how much every part costs, how many workers are needed and the size of their salaries. Executives want to know every financial detail. Af…

The papers I've seen point to values larger than 15~30% - I've seen ~50% cited for geometries as large as 65nm, only to get worse as we go to even smaller feature sizes. [1] Thresh…

Leakage power is actually very significant part of the total power usage [1] and one of the bigger reasons why Intel developed the tri-gate technology [2]. Active power is the one …

You're going to be I/O bound (network or disk), memory bound, or compute bound. It's hard to imagine the Redstone systems besting Xeon based servers in any of the three.

Not quite true - Greek bonds did not have significantly higher interest rates than other Euro denominated bonds. Greek bond chart: http://www.bloomberg.com/quote/GGGB1YR:IND/chart …

I think it's more that the "mainstream" computing has moved on from desktops to laptops. Instead of targeting the latest and greatest design at 130W/90W TDP desktop parts and downs…

If you're interested in these patent issues, you should add FOSS Patents ( http://fosspatents.blogspot.com/ ) to your RSS reader. Florian has the list of patents being asserted by …

I think you may have missed one of the central point that Urs was trying to make: "Software development costs often dominate a company’s overall technical expenses, so forcing prog…

Something based on the Cortex-M series ( http://www.sparkfun.com/products/10664 ) probably is a better ARM starter board for someone who's getting started on the embedded stuff. Co…