blueintegral

8 ms·

31.
by blueintegral 10y ago
Apparently it's binary coded decimal.
32.
by blueintegral 10y ago
You might also like PoC||GTFO: https://www.alchemistowl.org/pocorgtfo/
33.
by blueintegral 11y ago
The phrase "incredible journey" is often used by startups when they get acquired, especially when the acquisition also means shuttering the product or service. People like to joke because of how often that phrase is used. http:&#
34.
by blueintegral 11y ago
Wow, a radar that uses ionizing radiation is a crazy idea.
35.
by blueintegral 11y ago
If you opened some of the built in audio files in Windows XP with a hex editor, you could see that they were created with a cracked version of SoundForge. http://www.tomshardware.co.uk/pirated-software-used-to-creat...
36.
by blueintegral 11y ago
Someone filed a FOIA with the FBI to try to get them to release it: https://twitter.com/wisemana/status/677510714236510209 Seems like it's unlikely that you can just FOIA arbitrary data from a CD or hard driv
37.
by blueintegral 11y ago
Whether you get a USRP or not, the Ettus Research bootable image has GNU Radio already installed and configured, as well as a bunch of other useful radio tools: http://files.ettus.com/liveusb/latest/ They've
38.
by blueintegral 11y ago
Maybe it's hidden like this? https://www.youtube.com/watch?v=OECOoNYZXmk
39.
by blueintegral 11y ago
Oh, one other thing I wanted to add: The 3-4 year lifetime of lead acid batteries is the average lifetime. There are certainly outliers, but if you go to the store and buy a lead acid today, the warranty is about 3 years. The BMW thing is i
40.
by blueintegral 11y ago
You should get a bit longer than just a month of disuse before it shuts itself off. Are there modern cars that don't even let you use the key to open the door? I know Tesla has the thing where the handle is flush with the door, but are
41.
by blueintegral 11y ago
Ohm can be used for racing, assuming the rules of the race don't require using a stock battery. A lot of our early users and testers actually come from the racing community.
42.
by blueintegral 11y ago
The DOT regulates your ability to physically ship batteries through the mail, but there's actually no formal stamp of approval that the DOT gives car batteries. They do have approval processes for other car parts, including electric c
43.
by blueintegral 11y ago
Yeah, the supercaps are our most expensive BOM item.
44.
by blueintegral 11y ago
It depends on a lot of things of course, but yes, over the lifetime of the battery, it will pay for at least a large percentage of itself. We estimate about $10 a year gas savings.
45.
by blueintegral 11y ago
It varies based on the specific car you have, but the short answer is "several". We've been measuring the current needed to start a bunch of different cars, and the results are pretty varied (based on temperature, engine comp
46.
by blueintegral 11y ago
We're being conservative with the temperature rating for now. The components are rated better than that, but we're still running cycle tests in our temp chamber and waiting to get the system tested by an outside lab.
47.
by blueintegral 11y ago
Actually, our very first prototype was a thing that sat on top your existing car battery. After talking to some people, it seemed like they preferred it integrated into the battery itself. It makes the price easier too, since you're no
48.
by blueintegral 11y ago
We've been trying to avoid using the term "smart battery" for that very reason haha. We don't think people would be psyched about having a BLE connection and an app for their car battery.
49.
by blueintegral 11y ago
Yeah, we're still figuring out the best way to handle collecting the units at the end of life, but there's already places like this that we can send them to and keep it from turning into e-waste: http://www.kinsbursky.c
50.
by blueintegral 11y ago
Interesting! I had not thought of that, but it makes a lot of sense. What's the average electric bike battery capacity?
51.
by blueintegral 11y ago
Yeah, safety is obviously the most important thing. Right now we're basing the safety claims on the those of the component manufacturers. But it's also going to be a function of the enclosure and component locations, etc. Once all
52.
by blueintegral 11y ago
Bingo.
53.
by blueintegral 11y ago
It's hard for me to say exactly how many times you can start it before having to wait for the caps to charge back up, since we've measured a surprisingly high variation of required starting current over a bunch of different cars.
54.
by blueintegral 11y ago
You're right! Lead acid car batteries are one of the great recycling success stories. What's interesting is that the volume of lead acid car batteries in the world is so high, that even at that high recycling rate, that still leav
55.
by blueintegral 11y ago
Hey everyone! I'm Hunter, one of the cofounders of Ohm. Let me know if I can answer any questions.
56.
Ohm (YC S15) is a smarter, lighter car battery that works with your existing car(techcrunch.com)
274 points by blueintegral 11y ago|256 comments
57.
by blueintegral 11y ago
I believe they're basing it on size, temperature, and the assumption that the planet is rocky.
58.
by blueintegral 11y ago
Note that the Ultrastable Oscillator they use for their 30 MHz frequency reference has a short term stability of 1 part in 10 trillion! To compare, TCXOs used in commercial circuitry often have a stability of around 1 part per million.
59.
The RF Telecommunications System for the New Horizons Mission to Pluto [pdf](boulder.swri.edu)
9 points by blueintegral 11y ago|6 comments
60.
by blueintegral 11y ago
Dave Jones can be a little dramatic during videos like this. I wish he spent more time talking about ways you could actually achieve the claims of the product and less time just cutting down the designers. It's easy to point out all th

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