kbaker

39 ms·

361.
by kbaker 13y ago
I'm pretty sure that to get 1 Watt you have to use direct sequence or frequency-hopping spread spectrum under FCC part 15.247... Just sitting on a frequency as a 15.249 device or general ISM device you aren't allowed to use much p
362.
by kbaker 13y ago
Except, Google might not be able to show that prefix video using the API MS is/was using, but they would be able to do it if MS supported the standard HTML5 iframe API...
363.
by kbaker 13y ago
Amateur radio can't be used since the FCC prohibits the use of encryption or otherwise obfuscating the content of messages. Also, commercial use of amateur radio is prohibited which means using e.g. an open WiFi access point with your
364.
by kbaker 13y ago
minor nitpick - it sounds like parley is storing the encrypted private keys on their server, encrypted with the user's passphrase. This method is the best tradeoff with cloud encryption IMO - convenience of having the key file accessib
365.
by kbaker 13y ago
Close... Ethernet is isolated through magnetic transformers on both sides, so any existing common mode noise or DC voltage is removed leaving only the AC data signal. PoE (the standard, 802.3af/at) works by injecting DC power after the
366.
by kbaker 13y ago
Make sure you are using HTTPS exclusively so you aren't vulnerable to Firesheep-style attacks.
367.
by kbaker 14y ago
What issue? Please cite your sources... The best part of Bitcoin is that when a problem is found, people can upgrade the software and move past it. Even if there was a weakness in certain cipher, the way Bitcoin is constructed it would take
368.
by kbaker 14y ago
Yeah, seems like ns3.serverfault.com was SERVFAILing its own record, so now that it has timed out all serverfault domains are down.
369.
by kbaker 14y ago
No, it won't, both their primary and secondary DNS are resolving it with SERVFAIL. Pretty bad...
370.
by kbaker 14y ago
Awesome, it's surprisingly good data, with very little noise! Much better than I would expect from a phone barometer!
371.
by kbaker 14y ago
Maybe on file upload, they encrypt it with the file hash then chunk those encrypted files and store those with dedup. Then, on the user side, they store an per-user encrypted index (random, counter, MAC) to those individual chunks to repres
372.
by kbaker 14y ago
It's Adium that logs by default, not Pidgin (which correctly disables logging.) http://trac.adium.im/ticket/15722
373.
by kbaker 14y ago
It really depends on how complex your product is, and how good your PCB designer is. We are getting into some decently high-speed designs (LVDS/USB) and it is definitely a learning process with every board... As far as pitfalls, they range
374.
by kbaker 14y ago
Our recent projects through the FCC were about $5-6k for a single product, and around 1-2 week turnaround time. Granted, we have intentional radiators (like wifi radios, cellular modems) in our products so it may be more expensive. YMMV of
375.
by kbaker 14y ago
Maybe 'The Lights in the Tunnel: Automation, Accelerating Technology and the Economy of the Future' by Martin Ford? I haven't finished the whole thing yet, but so far it has been a good read about some of the problems with increased automat
376.
by kbaker 15y ago
Nice work reusing the ECC data in QR codes to hold the image, unfortunately it is still a bit noisy due to the limits of Reed-Solomon. I use a similar technique (just the center part, though) on http://www.qrpixel.com .
377.
by kbaker 15y ago
Thanks for trying it out! Right now this generates a QR code that is almost completely compliant with the QR code spec and should work with every QR code reader. Adding images would start to rely on the error correction which is set to Low
378.
by kbaker 15y ago
This is a different method than using error correction that allows for more usable area (see details in other threads.) It still leaves 7% of the ECC intact so you can further modify the code after it is generated. I had to modify a few pix
379.
by kbaker 15y ago
Yikes... that is quite high on the todo list (add selector boxes for a "pen" to draw with) but unfortunately it didn't make it for this release.
380.
by kbaker 15y ago
Unfortunately that feature got dropped from the MVP... it's definitely very high up on the list. You can edit the image afterward of course. Thanks for trying it out!
381.
by kbaker 15y ago
Yes, this encodes the actual image into the QR code data, with error correction intact. This allows for a larger image area and you still get the benefits of error correction. There is a padding section between the data (roughly encoded in
382.
by kbaker 15y ago
Yes, an API or some easier features to do multiple URLs may come at some point. This is a bit different from abusing the error correction as presented elsewhere - this actually encodes the image as data (padding actually) into the QR code s
383.
by kbaker 15y ago
Yes, you can use the resulting image for anything with no restriction. I don't care if you take out the little qrpixel blurb or want to modify it further. Really I am just looking to introduce a different method of encoding images in QR cod
384.
by kbaker 15y ago
This is my side project I've been working on for a while now, and I've just gotten around to a v1.0 release. Questions and feedback highly appreciated! Leave a message here or email me at info@qrpixel.com.
385.
Show HN: QR Pixel encodes pixel art in QR codes.(qrpixel.com)
119 points by kbaker 15y ago|25 comments