17h
comment Indoor Positioning System
SSID and MAC are broadcast in the clear by the access point before you authenticate to it, in order that you can find it in the first place.
17h
comment Indoor Positioning System
SSID and MAC are broadcast in the clear by the access point before you authenticate to it, in order that you can find it in the first place.
1d
answered Thought Process on Designing Circuits
1d
comment Circuit with "output" resistance as a linear function of "input" resistance
It's probably much easier to fiddle with the output of the midi controller in software.
1d
comment CADSOFT EAGLE libraries searching best practices
Why is this being downvoted without explanation?
Mar
27
answered How do hybrid electronic systems work?
Mar
27
comment Power Usage of a GPR System?
I don't think we can answer this without knowing anything about the GPR system; how long is a piece of string?
Mar
27
comment In a highly charitable society, are there any ways to remain impoverished?
"found the cultural and societal differences to be too great" - so going to other planets is easy, but going to Norway is inconceivable?
Mar
27
comment Why does a CPU have a clock?
Asynchronous (clockless) design has been done e.g. cl.cam.ac.uk/~rdm34/jmm03.pdf but it's not really been commercialised because it's so different and not spectacularly better.
Mar
26
comment Usb input current requirements for a power bank
That's definitely 2.61 miliamps. I suspect your problem is insufficient headroom for the buck converter and you might get better results with a buck/boost, but I'm not sure.
Mar
25
awarded Nice Answer
Mar
25
comment Usb input current requirements for a power bank
2.61A or 2.61miliamps?
Mar
25
comment Usb input current requirements for a power bank
"powering the cell phone shows 2.61 on the 20 scale" which unit? Volts? Amps? Measure the delivered power into a resistor and you'll be surprised how low it is.
Mar
25
comment Why are critical flight computers redundant?
Google's systems are built around fail-and-retry as that's built into all the Internet protocols. Other large systems are similar and even embrace "crash-only" operation (see Netflix "chaos monkey"). This isn't appropriate for safety-critical real-time systems. It's an interesting contrast between a cheap system which in practice works nearly all the time versus a much harder to develop and more expensive system which can offer design guarantees.
Mar
25
answered Direct power from different terminals in a series of batteries
Mar
25
comment Why are critical flight computers redundant?
(Anecdotally I think the majority of "worked in QA fails early in production" faults are mechanical failures of solder joints; I believe aviation/MILSPEC used to prefer wire-wrap for exactly this purpose, but that's no longer practical with tiny packages)
Mar
25
comment Why are critical flight computers redundant?
I'm coming from the electronics rather than the aviation side here, so I'm not familiar with how well the paper trail works, but you might find this interesting if you like detail: bunniestudios.com/blog/?page_id=1022
Mar
25
awarded Teacher
Mar
25
answered Why are critical flight computers redundant?
Mar
25
comment How to output audio using an altera DE0 FPGA?
R-2R ladder directly, trivially off the expansion header would work provided you run it straight into an amplifier to buffer it.
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