Hackaday Links: April 22, 2018

Eagle 9 is out. Autodesk is really ramping up the updates to Eagle, so much so it’s becoming annoying. What are the cool bits this time? Busses have been improved, which is great because I’ve rarely seen anyone use busses in Eagle. There’s a new pin breakout thingy that automagically puts green lines on your pins. The smash command has been overhauled and now moving part names and values is somewhat automatic. While these sound like small updates, Autodesk is doing a lot of work here that should have been done a decade ago. It’s great.

Crypto! Bitcoin is climbing up to $9,000 again, so everyone is all-in on their crypto holdings. Here’s an Arduino bitcoin miner. Stats of note: 150 hashes/second for the assembly version, and at this rate you would need 10 billion AVRs to mine a dollar a day. This array of Arduinos would need 2 Gigawatts, and you would be running a loss of about $10 Million per day (minus that one dollar you made).

Are you going to be at Hamvention? Hamvention is the largest amateur radio meetup in the Americas, and this year is going to be no different. Unfortunately, I’ll be dodging cupcake cars that weekend, but there is something of note: a ‘major broadcaster’ is looking for vendors for a ‘vintage tech’ television series. This looks like a Canadian documentary, which adds a little bit of respectability to this bit of reality television (no, really, the film board of Canada is great). They’re looking for weird or wacky pieces of tech, and items that look unique, strange, or spark curiosity. Set your expectations low for this documentary, though; I think we’re all several orders of magnitude more nerd than what would be interesting to a production assistant. ‘Yeah, before there were pushbutton phones, they all had dials… No, they were all attached to the wall…”

The new hotness on Sparkfun is a blinky badge. What we have here is a PCB, coin cell holder, color changing LED, and a pin clasp. It’s really not that different from the Tindie Blinky LED Badge. There is, however, one remarkable difference: the PCB is multicolored. The flowing unicorn locks are brilliant shades of green, blue, yellow, pink, purple, and red. How did they do it? We know full-color PCBs are possible, but this doesn’t look like it’s using a UV printer. Pad printing is another option, but it doesn’t look like that, either. I have no idea how the unicorn is this colorful. Thoughts?

Defcon is canceled, but there’s still a call for demo labs. They’re looking for hackers to show off what they’ve been working on, and to coax attendees into giving feedback on their projects.

Hackaday Links: July 31, 2016

Going to DEF CON this week? Getting into Vegas early? We’re having a meetup on Wednesday, in the middle of the day, in the desert. It’s all going down at the grave of James T. Kirk. Rumor has it, the Metrons will abduct a few of us and make us fight to the death on a planet with impossible geology.

The Hara Arena is closing down. The Hara Arena in Dayton, Ohio is the home of Hamvention, the largest gathering of amateur radio enthusiasts in the US. I was there last May, and I can assure you, the Hara Arena has fallen into a state of disrepair. The ARRL reports hamvention will be at a new venue next year. The last scheduled event, after which there will be an auction for venue equipment and furniture, will be on August 27th. It’ll be a comic book and toy show.

Hackaday.io has a log of projects. Some might say it has too many projects. The search is great, but sometimes you just want to look at a random project. That’s the problem [Greg] solved with his Hackaday.io randomizer. It returns a random Hackaday.io project, allowing you to gawk at all the boards and resistors found within.

Primitive Technology is a YouTube channel you should watch. It’s a guy (who doesn’t talk), building everything starting with pre-stone age technology. He built a house with a heated floor, somewhat decent pottery, and this week he entered the iron age. The latest video shows him building a squirrel cage fan out of clay and bark to smelt iron. The ore was actually iron-bearing bacteria, mixed with charcoal and wood ash, and placed into a crude but accurate smelting furnace. The end result is a few bb-sized grains of iron and a lot of melted flux. That’s not much, and is certainly not an accurate portrayal of what was being done 5,000 years ago, but it does mean the Internet’s favorite guy in the woods has entered the iron age while completely skipping over bronze.

Freeside Atlanta says they’re the largest hackerspace on the east coast, and to show off all the cool goings on, they made a walk through video.

Hackaday has a retro edition. It’s a wide selection of Hackaday posts presented in a format without JavaScript, CSS, ads, or any other Web 2.0 cruft. There’s an open challenge for anyone to load the retro site with a 4004 CPU. I know it can be done, but no one has presented evidence of doing it. [Lukas] just sent in his retro submission with a Z80 single board computer displaying some of the page on seven-segment displays. It’s basically a terminal emulator connected to a laptop that does most of the work, but this is the most minimal retro submission we’ve ever received.

An Arcade Bar And Hackerspace, All In One

Hamvention was last weekend, and just like Hackaday’s expedition to Maker Faire, it was only fitting to find a bunch of Hackaday fans and take over a bar. This was in Dayton, Ohio, and you would think the nightlife for Hamvention would be severely lacking. Not so, as downtown Dayton is home to Proto BuildBar, a bar, arcade, and hackerspace all wrapped into one.

We’ve heard about Proto BuildBar a few years ago when it first opened. The idea is relatively simple; instead of having a hackerspace, with alcohol and video games on the side, Proto BuildBar is first and foremost a bar, with 3D printing services, a few workstations for soldering, and a few arcade games. It’s the perfect place for an impromptu meetup.

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Hamvention: The Flea Market

Last weekend was Hamvention, the place you want to be on the third weekend in May. It is the world’s largest gathering of amateur radio enthusiasts, and an exceedingly large flea market containing all sorts of electronica.

The booths of Hamvention include a few notable Open Hardware folk, but for the most part, you’re looking a few big booths from Yaesu, an entire section dedicated to everything ARRL, and a few pop-ups from the usual suspects. Rigol was there, showing off their test equipment and selling the DS1052E oscilloscope for far more than it’s worth. The Rigol Zed is a much better buy, anyway.

As with any gathering of hams, antennas are everywhere. The largest by far was the tower at right. With a little more equipment, this antenna could do a moon bounce. It’s a shame the moon was full this weekend, and everyone went to bed early.

Giant antennas and an amateur radio trade show notwithstanding, the biggest draw is the flea market. You’re looking at about two football fields worth of parking spaces, filled with cars, tents, and collapsible tables and the strangest electronic devices you’ve ever seen. What was that like? Read on below.

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The Booths Of Hamvention

Hamvention was last weekend in Dayton, Ohio. Last weekend was also the Bay Area Maker Faire, and if you want tens of thousands of people who actually make stuff there’s really only one place to be. Bonus: you can also check out the US Air Force Museum at Wright-Patterson AFB. The ‘Space’ hangar was closed, so that’ll be another trip next year.

The biggest draw for Hamvention is the swap meet. Every year, thousands of cars pull up, set up a few tables and tents, and hock their wares. Everything from radios from the 1920s to computers from the 1980s can be found at the swap meet. This post is not about the swap meet; I still have several hundred pictures to go through, organize, label, and upload. Instead, this post is about the booths of Hamvention. Everything imaginable could be found at Hamvention, from the usual ARRL folks, to the preppers selling expired MREs, and even a few heros of Open Hardware.

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Hackaday At Hamvention

There are a few interesting Hackaday gatherings going on next weekend. The first is the Bay Area Maker Faire. Most of the Hackaday and Tindie crew will be in San Mateo next weekend, and we’re giving away free tickets to the Faire – a $70 value, free to Hackaday readersHackaday is crashing a pub on Saturday night. There’s also a super-secret meetup on Sunday. Don’t tell anyone.

On the other side of the country, there’s an even better convention for people who build stuff.. It’s Hamvention, the largest amateur radio meetup in North America. I’m going to be there. Find me and pick up some Hackaday swag. I’ll be posting to the Hackaday Twitter all weekend.

A wooden modem and proof I can find cool stuff.
A wooden modem and proof I can find cool stuff.

The main purpose of my visit is to document the immense swap meet. There will be over a thousand vendors hocking their wares, from antique radios to gauges and other electronic paraphernalia. It is the biggest draw to Hamvention, and by every account I’ve heard, it’s impossible to look at everything.

It might be impossible to look at everything, but apparently I’ve very good at separating the wheat from the chaff at ham swaps. During my last visit to the W6TRW swap meet in Redondo Beach, I found an UltraSPARC laptop (!), and a wooden modem from the mid 60s. On Friday, Saturday, and Sunday, it will be my job to document all the oddities of Hamvention.

Depending on how many people I meet at Hamvention, there might be a semi-official Hackaday get together after the show. The US Air Force Museum at Wright-Patterson would be cool, but Ihop or Denny’s would be far more realistic. Look for the guy in the Hackaday hoodie flying a Hackaday flag and he’ll give you some sweet stickers and swag.

Two Guys, a Hotel Room and a Radio Fire

Can you build a HF SSB radio transciever in one weekend, while on the road, at parts from a swap meet? I can, but apparently not without setting something on fire.

Of course the swap meet I’m referring to is Hamvention, and Hamvention 2016 is coming up fast. In a previous trip to Hamvention, Scott Pastor (KC8KBK) and I challenged ourselves to restore tube radio gear in a dodgy Dayton-area hotel room where we repaired a WW2 era BC-224 and a Halicrafters receiver, scrounging parts from the Hamfest.

Our 2014 adventures were so much fun that it drove us to create our own hacking challenge in 2015 to cobble together a <$100 HF SSB transceiver (made in the USA for extra budget pressure), an ad-hoc antenna system, put this on the air, and make an out-of-state contact before the end of Hamvention using only parts and gear found at Hamvention. There’s no time to study manuals, antennas, EM theory, or vacuum tube circuitry.  All you have are your whits, some basic tools, and all the Waffle House you can eat.  But you have one thing on your side, the world’s largest collection of surplus electronics and radio junk in one place at one time.  Can it be done?

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