Adafruit Celebrates Ada Lovelace Day

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If you weren’t aware, today is [Ada Lovelace] day, so [Ladyada] and Adafruit Industries are spending the day celebrating the achievements of women in the fields of technology, art, engineering, and electronics. Specifically, the focus is on fellow female makers/hackers who are helping shape and promote the industry.

Once every hour, Adafruit Industries is profiling one influential woman, paying tribute to her work and contributions to the tech/maker/art/science space. You’ll see a lot of familiar faces throughout the day, including electronics extraordinaire [Jeri Ellsworth], Make’s own [Becky Stern], as well as [Sherry Huss] and [Louise Glasgow], two of Maker Faire’s leading ladies.

The bios are certainly worth taking a look at – aside from some of the more familiar faces, it’s a great chance to learn about a few makers who you may not have heard of before.

As an added bonus, Adafruit is offering 10% off all purchases from the store using a coupon code that can be found on their site, so be sure to check it out!

High Voltage Hacks: All About Electroluminescence

Although many might not know it, electroluminescent materials use high voltage, and thus qualify for our featured topic. Many may assume that these sheets work in the same way as LED lights, using low-voltage DC power.  This, however, is not the case, as they need around 100 volts of AC current to allow them to light up.

For a battery-powered solution, this means converting the battery’s DC power to AC. Adafruit has a good tutorial about working with EL wire and powering it up using a portable inverter. One should obviously be careful to properly insulate any clothing using this material as being shocked is generally not fun.

The video after the break is pretty long, but is well produced and will give you a good background of EL use. If you don’t have 30 minutes to dedicate to this, be sure to at least skip to 2:43 to see one of the coolest EL shirts we’ve seen. Continue reading “High Voltage Hacks: All About Electroluminescence”

Hackaday Comment Policy; We’re Cleaning Up.

Sit down for a moment commenters, we need to talk.
Yes, you all knew this post was coming one day. We’ve talked about this topic at length internally, and we have decided that we’re going to clean up our act. For some time, Hack a Day has been growing a reputation as the prime source of extremely negative, vulgar, rude, sexist, and inflammatory comments in the hacking community. We’ve had complaints from readers (yes there are readers that aren’t commenters, thousands of them) and fellow members of the hacking community about this problem for a long time. [Eliot] even mentioned it back in 2009 when a job applicant expressed concern. We’ve nicely tried to steer things to the positive in a variety of ways, from suggesting commenters to be more supportive, jokingly making a troll detector, and simply stating that the comments need to stay “on topic and nice”.

When we see things like these  tweets by [Jeri Ellsworth], we hang our heads in shame.

She’s not the only one. We actually get this quite regularly. As our readership grows, we see it more and more often. We get emails explaining that people have done a hack but don’t really want to post it because the commenters will just tear it apart in an unnecessarily aggressive and negative way. We have actually had people ask us to remove their projects and comments due to uncivil behavior. Constructive criticism is good, but insulting and angry deconstruction isn’t helpful to anyone.

We’re better than that aren’t we? We are fast, agile and fairly unrestricted in our content. We should be at the center of this community, not on the outer edges, reviled by many for the behavior of a few. Hackaday should be the teacher at the front of the classroom, not the kid in the back throwing wadded up paper at the kids in the front.

What we’re doing:
First off, as far as we can foresee, we will never close the comments section of our web site down. Hackaday should be a home for the entire hacking community and as such, you will always be able to settle in and have a reasonable discussion. We do not want to implement any sort of G+ integration or similar, nor do we want to require registration to leave a comment. We will if we absolutely have to, but lets try to avoid that.

Comment sections and forums have often been a place where negative comments can get out of hand. There are many theories for why this happens, but the result is usually the same: rules and moderation. Many sites have already laid down the law and are adhering to their goals of keeping things civil. We realize that we are to blame if our image is this poor, so we are doing something about it.

From this point moving forward, Hackaday comments will be civil. If you are posting an empty in-joke (“where’s the Arduino?”), a declaration of “not a hack”, a racist, sexist, completely off topic, platform-hating, or personally insulting comment, your post will be deleted. This will be at the discretion of whichever Hackaday staff member happens to see your comment first.

Can you criticize Hackaday?
You can’t walk into a business and start screaming about how much they suck without being escorted out immediately.  Same thing applies here.

We are always hard at work trying to find interesting hacks, makes, repairs, tweaks, videos, etc. that appeal to a wide spectrum of readers. We put this web site together for you, as well as 200,000 other individuals.  Not everything will appeal to everybody. That would be impossible. However, if you don’t like a post or project, just skip it – we’ll have another one ready in short order. We will feature projects that appeal to the seasoned EE as well as the complete beginner. We were all beginners at one time, and it would have been great to have something like Hack a Day around back then to show us hacks ranging from simple to advanced.

From time to time however, Hack a Day can be a less than desirable place to hang out, especially for those who are coming here for the first time. We don’t want to chase off young, creative minds. As a community, we should be helping those that are just starting to venture into hacking electronics.

If you have a problem, email us. You’ll probably actually get a response that way too.  My email is Caleb@ and you’re always welcome to email me personally. Again, please be civil (yep, I’ve had my share of death threats).

Grammar/spelling corrections and dead links:
No need to comment, just email us. A message to team@ will suffice, but you will probably get a quicker response by emailing the author directly. We know we have issues – we’re often so excited about a hack that some little goof slips by. Email us and we’ll fix it. Don’t write a 3 paragraph comment about how important the oxford comma is, or how we’re obviously incapable of functioning because we accidentally flubbed a word. We promise we will never intentionally screw up some grammar, spelling, or punctuation.

What you can will do to help:
Be constructive.

Every project here probably has an area that could be improved, or a part that was done inefficiently. Support your fellow hackers by offering your expertise. Explain why something isn’t working, or how you would improve it. Don’t slam them for their shortcomings. Also keep in mind that different people go about things different ways. Poster X didn’t build something the way you did?  Offer an alternative without being insulting. If someone chooses to use their brand new Core i7 monster system to drive a few LEDs, that’s their prerogative. Inside, we all know that it is not the most efficient use of money or technology, there’s no reason to beat that dead horse in public.

You know what else encourages hackers to do more projects? A pat on the back. I talk to people all the time who say that they just don’t have any constructive criticism for the projects, so they don’t comment. Well, that and they know they’ll bring the ire of the worst commenters if they happen to ask a silly question. Drop in and say what you like about a project. Those positive posts might just be enough to encourage that hacker to take it a step further. How many projects have you seen dropped simply because people thought there wasn’t any interest? Tons. If you like a project, let them know.

To encourage this, the writers are going to be keeping an eye on the comments. Randomly, when we see someone being exceptionally helpful, we’ll contact them and send them a prize. This will most likely be in the form of a hackaday sticker, but we’ll see if we can’t find some other fun things as well.

Help us make Hack a Day great. Please.

[Update: we’re working on a comment flagging system currently]

[Update: threading and comment reporting have been added]

PLL 101

[Jeri Ellsworth] and former Commodore Computer engineer and current full time tinkerer [Bil Herd] have a little chat on skype covering the 101’s of Phase Lock Loops in this hour long video. PLL’s are handy for many applications, but their basic use is to keep clock signals in sync.

Topics covered include: Why we care, a basic explanation for the CD4046, capture ranges, and meta stability. Examples from analog tv, to clock recovery, finding falling edges and FPGA’s. This thing is jam packed full of information.

With talks of future episodes and a quick tour of [Bil’s] bench this is something to not miss. Join us after the break for the video!

Continue reading “PLL 101”

A Bright Idea

[Jeri Ellsworth] had a bright idea – a brain-activated light bulb that floats above your head. While out and about, she saw some guy with a video game icon attached to metal rod sticking out of his backpack. The rod made the icon appear to be floating above his head (think The Sims), which was the inspiration for this LED powered light bulb. The bulb is connected to a metal rod, as well as a metal hoop which is springy enough to keep a pair of electrodes snugly attached to your head.

Those electrodes, along with a third probe used for noise reference, are hooked up to a AD620 instrumentation amplifier. With the help of op amps, it modulates the red or green LEDs that are attached to the back side of the light bulb. The end result is an amusing way to show brain activity while being grilled on a Q/A panel, or while just wandering around taking in all the amazing sights presented at Maker Faire.

Join us after the break for a video demonstration.

Continue reading “A Bright Idea”

According To Pete – New Online Video Series

This is [Pete Dokter], the fourth employee that Sparkfun ever had and currently Director of Engineering there. As you can see, they’re not letting [Peter] come out of his hole. Instead of designing new breakout boards they’ve given him a camera that he’ll be using to record his occasional pontifications. ‘According to Pete’ will become a regularly occuring online show where he answers questions from around the Internets. We’ll admit that the first episode, embedded after the break, is a bit content thin – serving only as an introduction. But we think [Pete] has a pleasant manner and we look forward to what blossoms out of this modest beginning.

We’ve long been fans of engineering-oriented online shows such as [Dave Jones’] EEVBlog, [Bill Hammack’s] The Engineer Guy, A collaboration between [Chris Gammell, Dave Jones, and Jeff Keyzer] call The Amp Hour, [Jeri Ellsworth’s] A-Z Videos and her upcoming series, [Ben Heck’s] The Ben Heck Show…. and we could go on.

With offerings like these you don’t need to wait for traditional TV to transition to IP delivery. Just stop watching crap and start watching these interesting shows.

Continue reading “According To Pete – New Online Video Series”

Free Energy Is For Fools?

In her new element-14 video [Jeri Ellsworth] explains some  concepts about “free to you” energy and features the LTC3109EUF, an Auto-polarity, Ultra low Voltage Step-Up Converter and Power Manager, along with the LTC3588EMSE a Piezoelectric Energy Harvesting Power Supply.

Using the LTC3109EUF she is able to power a modified Nintendo Entertainment System, and LCD using a small generator and an exercise bike. The LTC3588EMSE is wired up to piezo’s in different applications including being squashed, vibrated, and temperature difference to power low current devices.

All this and a totally 80’s theme, so poof up your hair, get your spiked dog collar, and find those neon green shades because this is a fun and informative video available on element-14.