Jeremy Curtis

4.8K posts

Jeremy Curtis

Jeremy Curtis

@rjcurtis

Independent consultant offering IT, AV and custom electronics and embedded firmware services.

Cambridge, uk Katılım Ocak 2009
269 Takip Edilen92 Takipçiler
Jeremy Curtis
Jeremy Curtis@rjcurtis·
@Rockstarscars I wonder if BMW would come out of that happened to my BMW. The only small problem is it turns 19 this year…
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Rockstars Cars
Rockstars Cars@Rockstarscars·
We seem too slow to praise these days, Volvo Assist are legends.. turbo pipe blew, went into limp mode on M25, got it to where I needed to be, they were there within 40mins, had the part on the van, engineers fitted it and got me on my way within 90mins Thanks again! pls RP
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Dave Jones
Dave Jones@eevblog·
And things like the highly popular express VPN have 14 ratings on a Mac? What alternate universe have I entered...
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Dave Jones
Dave Jones@eevblog·
Practically nobody uses Lastpass on Safari? Why?
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@eevblog Download direct, quite a few browsers available. Though Safari is very good.
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Dave Jones
Dave Jones@eevblog·
So no Firefox for the Mac?
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@eevblog Just quit the keyboard setup. The Yubikey identifies as a keyboard to the OS wants to identify the language and type. Just ignore it.
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Dave Jones
Dave Jones@eevblog·
WTF, a Mac can't use a Yubikey? It needs to be setup and I can't press the key because it doesn't have any.
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@IanSJohnston @eevblog Apart from trips to London to visit a client or a site, trains don’t really factor in my business travel. For be fair though, my commute is ~30s from house to office. Faster if it’s raining.
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Dave Jones
Dave Jones@eevblog·
High Speed Rail in Australia? Great!, let's build it. But I have a question. $500M has already been spent on initial PLANNING, and they want another $667M for more PLANNING. How exactly to do you spend over a billion dollars on planning something? Like where does the money actually go? What was it actually spent on? What did we get out of it? It had better be a lot more than a nice report. afr.com/companies/tran…
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@oz1lqo @DanielBogdanoff I’m afraid you need to part with two organs. One for the scope. The other for the software options. The functionality is in there already, just locked behind a paywall.
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Søren Kjærsgaard 
Søren Kjærsgaard @oz1lqo·
Oh I know, and I’d love to upgrade to a grownup model, but don’t want to trade in a redundant organ in the process 😂 If only my beloved entry grade had that button.. ☺️ (it’s fully loaded btw., except for the digital option) Hmm. I have a Pico 2208B somewhere, I wonder .. 🤔 They’re known to do all kind of things 🙂
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Søren Kjærsgaard 
Søren Kjærsgaard @oz1lqo·
Fellow EEs, I need a universal counter which can totalize pulses like these over a set time, fx. 1 second, and do statistics over subsequent measurements… Any ideas? Amount of pulses during the test window is of stochastic behavior, but ranges from 20-40 per second to several thousands… Any ideas? 🙏🏼🙂
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@IanSJohnston @eevblog Given the distances involved HS rail gives virtually no tangible benefit, maybe 15 mins saving? Crazy project.
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Ian Scott Johnston
Ian Scott Johnston@IanSJohnston·
How the UK ended up building the world's most expensive railway. High Speed 2 (HS2) in England has seen costs surge from an initial £32.7bn to over £100bn, with the London-to-Birmingham phase alone estimated at £49bn–£66bn. It is one of the world's most expensive railways, costing roughly £200M–£396M per km, compared to £25M–£32M per km in Europe. USELESS British government…….
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@eevblog Is there any AC in there? Could be toasty in the summer.
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Dave Jones
Dave Jones@eevblog·
I could almost do a straight lab swap for this: Downside: An annoying 10km drive. And probably next door to a smash repairs or something. The dumpster wouldn't be as good.
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@eevblog Wait until you have a power supply on test, then roll your chair over some bubble wrap on the floor. Got me few times that.
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Dave Jones
Dave Jones@eevblog·
Something on this bench just rang, like a phone. There is nothing like that there. I'm confused and scared.
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@eevblog Not really. Photo driving licence is kind of a de facto ID. The back end data is all linked to passports etc. If there was a single login available for all gov (local and central) data systems, that would have been great.
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Mikes Electric Stuff
Mikes Electric Stuff@mikelectricstuf·
WTF? Seems @PCBWayOfficial no longer have a card payment option (despite still showing it on their order page)- bank transfer or Payoneer only. Considering what they spend on YT sponsorships, seems pretty suicidal for international business. @jlcpcb still works just fine.
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@davepl1968 I have a few network taps, very handy for mooching around a network. Bar a brief port down/up cycle, they are in invisible.
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Dave W Plummer
Dave W Plummer@davepl1968·
We had Bloodhound at Microsoft long before that. But we needed special permission to even run it on the LAN, as you could see all traffic. Even mail wasn't encrypted at the time, I imagine. For the curious, most of this is done by placing the NIC into "promiscuous" mode. Normally it filters out packets not intended for it MAC, but once in promiscuous mode all packets come through, and you can inspect anything on your segment.
Robert Graham@robertgraham

So the other side of this was me. By 1997, I had written or rewritten most all the "protocol decodes" in the "Sniffer™ Network Analyzer", the premier closed-source product for this sort of thing. The reason it was expensive is that it could capture at WIRE SPEED. We wrote special hardware drivers that could keep up with the network, capturing all the packets. Competing solutions, especially Ethereal/Wireshark, could not. You could analyze slow networks with Ethereal, but not fast ones. Capture and analysis are two different things. The Sniffer™ did them both than anybody else. Linux didn't get close to wire-speed capturing until around 2010, and still isn't quite fully there. But now you can do some reasonably fast filtering in Wireshark to get just the packets you want, without losing them. This isn't a problem, though, because now most capture is done on the ends instead of the middle. Tapping into wires or hanging off mirror ports is much more rare. Writing protocol decodes is grunt work, and exactly the sort of thing that's amenable to open-source. For a vendor, we have to figure out which protocols customers want that will increase overall product sales. It means fewer and fewer obscure protocols being decoded. With open-source, even the least popular most obscure protocols get decoded. Some engineer simply roles up their sleaves and writes just enough code to decode what they need, and when it's not enough for the next engineer, they write more. In the long run, it means everyone eventually has to use it, because we always come across something obscure. That the Sniffer™ would eventually get replaced by an open-source product was inevitable. Anyway, I left in 1998 to create a company to do deep packet inspect at wire speed, but that's another story.

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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@EliteDangerous As an original game player and a backer of the kickstarter reboot, I really must find some time to get back into Elite. Need to sort out a decent HOTAS first. I'm reminded every time I pass Frontier HQ, which is a 10 min walk away. #musttryharder
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Elite Dangerous
Elite Dangerous@EliteDangerous·
o7 and Happy Holidays to all our Commanders! ⭐ 🦌 🦌 🦌 🦌 🦌 🦌 🦌 🦌 🦌 🚀
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
Given the quantity in a box of Quality Street, should they not be renamed Quality Mews?
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@nkhanrr @eevblog For this, probably. Some Keysight kit now has key features as rentable. The E36731A battery emulator and profiler, you need to rent the licence to use the battery emulator and profiler! A mere 15% of the product price per year to use the core function printed on the front of it.
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@Fastmail Would not ticking the "Allow" option in the profile, as below, enable the user to choose to add a certificate if they wanted to? If so, what would be the harm in enabling that?
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Fastmail
Fastmail@Fastmail·
@rjcurtis Hi Jeremy! It's currently possible to enable encryption if you add your Fastmail account to the iOS Mail app manually instead of using the automatic configuration profile. fastmail.help/hc/en-us/artic…
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Jeremy Curtis
Jeremy Curtis@rjcurtis·
@DanielBogdanoff @ElectronicsbyJH I bought my MSOX-3104T from the Keysight used store (when it was on eBay). New equipment simply isn’t affordable. Doubly so as so many things need additional licenses to activate features. Was interesting in the new scope, until I got a price list.
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Dave Jones
Dave Jones@eevblog·
@karthikponna19 About 20% of my AdSense income comes from Premium users. I use it myself, it's great.
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Karthik
Karthik@karthikponna19·
never met a YouTube premium user
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