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  • jkabtech 4:17 am on February 19, 2018 Permalink | Reply
    Tags: , , , , Streamer   

    Raspberry Pi Media Streamer Is Combat Ready 

    to his latest project, and it makes perfect sense to us.

    It should come as no surprise that a military ammo can has quite a bit more space inside than is strictly required for the Raspberry Pi 3

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  • jkabtech 8:17 pm on February 18, 2018 Permalink | Reply
    Tags: , , Useless   

    The Most Useless Tools You Can’t Seem to Part With 

    “aperture”:”2.4″,”credit”:””,”camera”:”iPhone 4S”,”caption”:””,”created_timestamp”:”1508969482″,”copyright”:””,”focal_length”:”4.28″,”iso”:”400″,”shutter_speed”:”0.05″,”title”:””,”orientation”:”1″

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  • jkabtech 12:17 pm on February 18, 2018 Permalink | Reply
    Tags: , , , Minimalist,   

    Hackaday Prize Entry: The Minimalist Z80 Computer 

    realized he could build a Z80 microcomputer with $4 worth of parts from everyone’s favorite online auction house. The result is a $4 Z80 home computer, and a great Hackaday Prize entry to boot.

    So, what do he need to build a retrocomputer loaded up with Forth, CP/M, and Basic? A CPU is a necessity, and

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  • jkabtech 4:17 am on February 18, 2018 Permalink | Reply
    Tags: , Reconstructing   

    Reconstructing a Blurry QR Code 

    attempted to use a QR code containing a private key to give away some cryptocurrency on TV, but the code was blurred out by the broadcaster. Not ones to give up easily,

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  • jkabtech 8:17 pm on February 17, 2018 Permalink | Reply
    Tags: , Sword, Thermite   

    Thermite Creates a Sword 

    compares two types of iron oxide, red and black, then judges their usability based on the post-ignition mass. His goal is to get the most metal from a single reaction. He also adds some stainless steel beads to improve the quality of the casting and to utilize some of the excess heat.

    With encouragement from his neighbors and a couple of trials with fire bricks, buckets, and sand,

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  • jkabtech 12:17 pm on February 17, 2018 Permalink | Reply
    Tags: Hollow, , State   

    Hollow State Memory 

    site. On the Cold War Infrastructure site, there’s a scan of an RCA ad for the beast, showing a picture of SAGE that apparently used the tubes. There are also links to some other pages about the tubes.

    If you are interested in old memory tech, we took a trip down memory lane last year. We aren’t sure if you could do the same debugging trick with these that you could with a Williams tube. With those, you could hook a CRT in parallel with the tube and get a visual representation of your memory, a trick used by Baby and several other old computers did.

    Posted in classic hacks Post navigation← Thermite Creates a SwordSkynet will have Bobcats → 5 thoughts on “” Alex Rossie says:October 26, 2017 at 7:09 pm

    I’m not sure how it’s possible that I’d never heard of these until I saw it on HaD something so far up my street I can taste it. So to speak. Wonderful video

    Report comment ReplyRW ver 0.0.1 says:October 26, 2017 at 7:10 pm

    Cool, I’d heard of those… seeming like quite high density for their day, even though they look ridiculously huge now.

    Report comment Replymatt says:October 26, 2017 at 8:32 pm

    How on earth did people design tubes like these? How would you prototype a complex vacuum-sealed arrangement of glass? I’ve never seen any design documents for tubes and I’m really curious how it’s done.

    Report comment Replyjpa says:October 26, 2017 at 11:02 pm

    You can prototype it without the outer glass and put it under a vacuum dome to test.

    Report comment Replyechodelta says:October 26, 2017 at 10:54 pm

    Glass blowing was quite an art. First came the tube with a shadow of a Maltese cross on the end. Then the beam and scanning, the scope was born. Progress built on it self.
    There once was a way of making a sample of a musical timbre by cutting out a piece of black paper in the shape of it’s single wave as displayed on the scope, the black paper is the half below the trace. Now the scope vertical was put into a feedback loop to keep the beam just on the edge of the paper mask as picked up by a photo tube in front with light shielding. When the horizontal was a keyboard selected frequency, the vertical was a sample at the full range of the keys. Ca.1960 or so, maybe much earlier. The paper trick probably inspired the internalization of things.

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  • jkabtech 4:17 am on February 17, 2018 Permalink | Reply
    Tags: Bobcats, Skynet   

    Skynet will have Bobcats 

    By contrast, the ATL (Autonomous Track Loader) is meant to do just that: to change the surrounding environment. Luckily, there is no morning traffic to complicate the task. Here’s the company teaser:

    In addition to spyder web drones, drone swarms and robot lawnmowner, Skynet will definitely dig having some ATLs.

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  • jkabtech 8:17 pm on February 16, 2018 Permalink | Reply
    Tags: Chien-Shiung, Parity:,   

    There Is No Parity: Chien-Shiung Wu 


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  • jkabtech 12:17 pm on February 16, 2018 Permalink | Reply
    Tags: British, , , Makeover,   

    Classic British Phone Gets a Google Makeover 

    decided to hack was the iconic British desk telephone, the GPO-746, or at least a modern interpretation of the default rental phone from the late 60s through the 70s. But the phone’s looks were more important than its guts, which were stripped away to make room for the Raspberry Pi and Google AIY hat.

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  • jkabtech 4:17 am on February 16, 2018 Permalink | Reply
    Tags: 1960s, Oceanographic, Retrotechtacular:,   

    Retrotechtacular: An Oceanographic Data Station Buoy For The 1960s 

    for the tip.

    Posted in RetrotechtacularTagged meteorology, retrotechtacular, weather buoy, weather station Post navigation← Classic British Phone Gets a Google MakeoverHackaday Prize Entry: Visioneer Sensor HUD → 11 thoughts on “” Ostracus says:September 28, 2017 at 11:11 am

    Well that bit of information certainly floated to the top of our attention.

    Report comment ReplyQueeg says:September 28, 2017 at 11:17 am

    At the 6:00 minute mark you can see workers on the deck and get a sense of the size of these things.

    No life jackets, safety vests, hard hats… a different time.

    Report comment ReplyLeithoa says:September 28, 2017 at 11:27 am

    Safety third.

    Report comment ReplyFW says:September 28, 2017 at 12:56 pm

    Well, at least in the top five.

    Report comment ReplyMark says:September 28, 2017 at 12:40 pm

    Ah yes, the good old days! When every carpenter had at most nine fingers and painters went mad from the fumes.

    Report comment ReplyOstracus says:September 28, 2017 at 1:01 pm

    Old B/W of skyscrapers being built. Safety net? Hardly.

    Report comment Replydave says:September 28, 2017 at 2:20 pm

    Back in the 1930s depression my grandfather worked on the Grand Coulee Dam in the US state of Washington.
    Everyone got a benzadrine(amphetamine) dose at the start of the night shift and again at the midnight-ish lunch. They lost people all the time and apparently there is a memorial to all of the men buried alive somewhere at the concrete of the dam. Grandad broke under the stress and drugs, had his freakout and became an apple farmer.

    Report comment ReplyDoug says:September 28, 2017 at 2:53 pm

    As soon as I seen the apparent HF discone antenna I had a sense of the size. In my imagination I see the engineers specifying the mast guy lines going “hey we can make an HF antenna with these”. Simple shor based HF antennas will increase the communications rang at lest cost than highe towers fr VHF

    Yes those where different times. I’m confused; do those making note of the lack of safety gear believe society should return to those times. In they event they do. In they event they,they should hold their breath. safety items add the the black line for the insurance sector at no cost to that sector.. Who does Joe Public believe who writes safety regulation?

    Report comment ReplyRedhatter (VK4MSL) says:September 28, 2017 at 3:13 pm

    Life jackets

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