Information Security

Analog Clock Goes Digital, or Vice Versa

Hack a Day - Fri, 11/16/2018 - 22:00

Designing a good clock takes a lot of considerations. It’s not just hands, faces, and numbers anymore; there are also word clocks, electronic clocks, marble clocks, or water clocks, and just about anything else imaginable can be used to tell time. Of course, electronic clocks are great for their versatility, and this one shows off an analog-looking clock that is (of course) digital, leveraging all of the perks of analog with all of the upsides of digital electronics.

One of the key design considerations that [Sasa] had while building this piece was that it needed to be silent. LEDs certainly fit that description, so the decision was made to go with an WS2812b ring. It runs using a STM ST32F103 Nucleo board (and a cheaper version of it in later versions of this clock) which shows a red LED for the current hour, yellow LEDs for the traditional analog clock divisions, a green LED for the current minute, and glows the rest of the LEDs up to the current minute with a rainbow pattern.

This is a really clean, simple build with good design at its core, and would be easy to replicate if you’re looking for an eye-catching clock to build. As a bonus, all of the schematics and code are available on the project site, so everything you need is there. If you’re looking for more inspiration, there are some clocks that are even more unique, like this marble clock that is a work of art — but is anything but silent.

Best resource for learning python

Your hacking tutorial - Fri, 11/16/2018 - 21:44

I've heard that python is the best language to learn first. I've seen some youtube serious but they are pretty dated. Are there many good updated websites/videos for free that I can learn from? I have a LOT of free time the next few months and I'd like to learn as much as I can.

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Categories: Information Security

/r/WearOS Watch Awards: calling all Wear OS users

Android - Fri, 11/16/2018 - 21:12

Over at /r/WearOS, we're running our first-ever Watch Awards to find the most-loved watch. If you are a Wear OS/Android Wear user, we need you to rate your watch(es)! Soon, we'll average out all the ratings to determine the wearable (and brand) you all love the most. Here's where to rate your watch.

In a few weeks, the results will be posted to /r/WearOS, so stay tuned there!

submitted by /u/citypanda
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Microsoft slips ads into Windows 10 Mail client – then U-turns so hard, it warps fabric of reality

The Register - Fri, 11/16/2018 - 20:03
We never meant to make that widely public which is why we made a public FAQ for it

Microsoft was, and maybe still is, considering injecting targeted adverts into the Windows 10 Mail app.…

Can't HTTP GET local host name?

Tasker: Total Automation for Android - Fri, 11/16/2018 - 19:28

I'm trying to set up some sonoff switches with tasmota, and I'm using the http commands. The problem is I can't get the HTTP GET to work with the switch's local host name, but it works fine with the ip address. Ie. Using

HTTP GET 192.168.1.123/(command) works fine, but

HTTP GET switchname/(command) does not work with Tasker. It does work on my pc browser, so I know I'm using the right name. Can Tasker not resolve local hosts by name?

submitted by /u/sudo_reddit
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Lanschool

Your hacking tutorial - Fri, 11/16/2018 - 19:07

Is there a way to hack lanschool and have teacher commands like lanschooled or no?

submitted by /u/im_kuda7
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Categories: Information Security

Looking for help finding hidden images

Cryptography - Fri, 11/16/2018 - 19:04

Have a roughly 21 minute video that has 2 hidden images in it. Please comment with interest and I'll PM you the details. Can provide compensation (not sure if that's allowed here).

submitted by /u/Frrrosty
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Categories: Information Security

Expanding 3D Printer Bed Stays True Under Fire

Hack a Day - Fri, 11/16/2018 - 19:00

It’s hard to pass up another lesson in good machine design brought to us by [Mark Rehorst]. This time, [Mark] combats the relentless forces of bed deformation due to thermal expansion.

Did you think your printer stayed the same size when it heated up? Well, think again! According to [Mark’s] calculations, when heated, the bed can expand by as much as half a millimeter in the x/y direction. While x/y deformation seems like something we can ignore, that’s not always true. If our bed is rigidly fixed in place, then that change in dimension will only result in a warped bed as it tries to make space for itself.

Don’t give up yet though. As sinister as this problem may seem, [Mark] introduces a classic-but-well-implemented solution: and adjustable kinematic coupling. The kinematic coupling holds the bed at the minimum number of points to keep it rigid while exposing thumbscrews to dial in a level bed. What’s special about this technique is that the coupling holds the bed perfectly rigid whilst allowing it to thermally expand!

This is the beauty of “exact constraint” design. Parts are held together only by the minimum number of points needed to guarantee a specific relationship. Here that relationship is coplanarity between the the nozzle’s x/y plane and the bed. Even when the bed expands this relationship holds. Now that is magic.

With such a flood of 3D printed parts on the market, building a printer has never been easier! Nevertheless, it’s easy to pin ourselves into a corner re-tuning a poor design that skips a foundation on the base principles. If you’re curious about more of these principles behind 3D printer design, check out [Mark’s] thorough walkthrough on the CoreXY design.

We asked the US military for its 'do not buy' list of Russian, Chinese gear. Surprise: It doesn't exist

The Register - Fri, 11/16/2018 - 18:47
El Reg drills into banned technology with Freedom-of-Info request

The US Department of Defense's "do not buy" list of foreign software and equipment turns out to be about as long as the list of bug-free Windows releases or privacy-focused Facebook apps.…

Bandit isses...0

Your hacking tutorial - Fri, 11/16/2018 - 18:24

So I'm just getting started and I have spent hours trying to find out what's wrong but can't find an answer

I'm on level bandit0 (lol go easy on me pls) and after typing in the password I get this message

packet_write_wait: connection to XXX.X.X.XXX port 2220: broken pipe

Anyone know some good material to look at to solve this issue.

submitted by /u/MrPositive1
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Categories: Information Security

[Update] - SMS and Call Permissions: One Step Closer

Tasker: Total Automation for Android - Fri, 11/16/2018 - 18:21

I've got some good news!

After Google got in touch with me about the SMS and call permissions in Tasker, they've now added Task Automation apps as an exception in their exception list!

I would be shocked if Tasker was denied the permissions now! 😁

In any case, I'll post the final confirmation after I (hopefully) get the approval from Google!

Thanks again for all your help throughout the whole process everyone! You're all super awesome!

Also special thanks to Mishaal Rahman for letting me know that the exception list was updated! 😀

submitted by /u/joaomgcd
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