We got a case of the Mondays just reading about [Sascha]’s work environment. Get this: every morning, first thing, the whole team gets together to check in and share how they’re all feeling. And they can’t even be candid about it—there’s actually an approved list of feeling descriptors, both good and bad. It’s an admittedly big list that includes, interestingly enough, both ‘tortured’ and ‘embarrassed’. Yeah. We think something like group t’ai chi on the roof each morning sounds a lot more relaxing. Since [Sascha] is between a rock and a hard place on this one, it was time to let chance take over. He raised his HaD-imprinted Trinket skyward and Can I Borrow a Feeling? was born.
The gist is simple: [Sascha] abstracts his disposition out to either ‘good’ or ‘bad’ and pushes the corresponding button. The Trinket accesses an array and returns a randomly selected feeling to the LCD. Since the official list of feelings is about 300 words long, [Sascha] has to push the data into PROGMEM. He used good old Excel to split the list in twain, and her formulas came in very handy for centering the result on the LCD. Once [Sascha] knew how it would all fit together, he designed a cool enclosure in CorelDRAW and turned on the laser cutter. See the Spreadsheet of Acceptable Words for yourself on GitHub, and pick up the code and enclosure file while you’re there.
There’s still time to enter the Trinket Everyday Carry Contest. The main contest runs until January 2, but we’re having random drawings every week! Don’t forget to write a project log before the next drawing at 9pm EST on Tuesday, December 30th. You and all of the other entrants have a chance to win a Teensy 3.1 from The Hackaday Store!
[Vasilis] has entered Lazydoro in the Trinket Everyday Carry Contest. Lazydoro is designed to get him up off his backside, and walking around. Recent medical research has determined that sitting too long is a bad thing. In fact, Dr. David Agus has been quoted by Nike as saying that sitting for several hours is as bad as smoking (wayback machine link). While we’re not exactly up on the latest medical trends, we can definitely see that getting up and walking around a bit never hurt anyone. Lazydoro will alert [Vasilis] once every 20 minutes or so to get up and stretch his legs a bit.
[Vasilis] plans to pair a Pro Trinket with an accelerometer module, specifically an ADXL377 from Analog Devices. The accelerometer will allow Lazydoro to determine if [Vasilis] has moved around. If 20 or 30 minutes go by without major movement, Lazydoro will nudge him to get up and take a walk.
Since shipping to Greece takes awhile, [Vasilis] is developing with an Arduino Uno and a ADXL345 while he waits for his parts to arrive. He’s hacked this into a wrist mounted device for testing. One thing [Vasilis] hasn’t figured out yet is how to alert the user to move around. A small vibrating motor would probably work – but we’d suggest electric shocks. A good zap always puts the spring in our step!
There is still plenty of time to enter the Trinket Everyday Carry Contest. The main contest runs until January 2, but we’re having random drawings every week! Don’t forget to write a project log before the next drawing at 9pm EDT on Tuesday, December 23. You and all of the other entrants have a chance to win a Cordwood Puzzle from The Hackaday Store!
Since early evening on September 5th, 2013 the US National Institute of Standards and Technology (NIST) has been publishing a 512-bit, full-entropy random number every minute of every day. What’s more, each number is cryptographically signed so that you can easily verify that it was generated by the NIST. A date stamp is included in the process, so that you can tell when the random values were created. And finally, all of the values are linked to the previous value in a chain so that you can detect if any of the past numbers in the series have been altered after the next number is published. This is quite an extensive list of features for a list of random values, and we’ll get into the rationale, methods, and uses behind this scheme in the next section, so stick around.
Continue reading “Towards the Perfect Coin Flip: The NIST Randomness Beacon”
You might notice that many of my writings start with “Back in the day”. Not wanting to disappoint I will say that back in the day we used to use wire wrap technology when we needed a somewhat solid, somewhat reliably assembly. Given a readable schematic a good tech could return a working or near-working unit in a day or two depending on the completeness and accuracy of the schematic.
Properly done a wire wrap assembly is capable of fairly high speed and acceptable noise when the alternative option of creating a custom PCB would take too long or not allow enough experimentation. Wire wrap is also used in several types of production, from telco to NASA, but I am all about the engineer’s point of view on this.
My first wire wrap tool and wire wrap wire came from Radio Shack in the mid 1970’s. I still have the wire, because frankly its kind of cheap wire and I use it when it’s the only thing I can reach quickly when I need to make a jumper on a PCB. The tool is still around also, given the fact that I can’t find it at the moment the one shown here is my new wire wrap tool which is good for low quantity wrapping, unwrapping and stripping.
The skinny little wrap tool is okay for hobbyist as the wraps are fine with a little practice. But I do recommend investing in high-quality wire. A common wire available is Kynar® coated, a fluorinated vinyl that performs well as an insulator.
Before I go too much further, here’s the video walkthrough of wire wrap, its uses, and several demonstration. But make sure you also join me after the break where I cover the rest of the information you need to start on the road to wire wrap master.
Continue reading “Wire Wrap 101″
We’ve held our third drawing for the Trinket Everyday Carry Contest. Once again we’ve used a Pro Trinket to pick the random winner. This week’s winner is [Scissorfeind] with his project Stylin’ safety jacket
In true hack style, [Scissorfeind] went into this project with two goals: A jacket that will be visible at night, and keep him “looking f*cking sick”. The jacket itself is a faux leather affair from a thrift store. [Scissorfeind] added some studs for bling, and he’s working on adding a ton of electronics for light.
The Pro Trinket will be driving a series of LED matrices, which [Scissorfeind] is working on turning into POV displays. The matrices come from an LED clock which [Scissorfeind] saved from the landfill. In fact, most of the parts in the jacket are upcycled from e-waste. The jacket is just starting to come together. We can’t wait to see the final results!
We hope that [Scissorfeind] enjoys his Bus Pirate V3.6 from The Hackaday Store. The Bus Pirate was designed by former Hackaday writer [Ian Lesnet] as a Swiss Army knife of electronic communications. If you’re trying to connect to a circuit with SPI, I²C, JTAG, or UART, the Bus Pirate has you covered. It can do plenty more though – from reading analog data to programming components. Check out [Brian Benchoff’s] full review on the Bus Pirate V3.6 product page!
If the pseudo random number gods didn’t smile on you this week, don’t worry, there are still two more chances to win a random drawing! Our next drawing will be on 12/23/2014 at 9pm EST. The prize will once again be a Cordwood Puzzle! To be eligible you need to submit your project as an official entry and publish at least one project log during the week.
The main contest entry window closes on January 2, 2015 – but don’t wait for the last minute! Hit the contest page and build some awesome wearable or pocketable electronics!
[BDM] is helping others keep WiFi safe with “Shame On You!“, his entry in Hackaday’s Trinket Everyday Carry Contest. We all have that family member, friend, or neighbor who just can’t seem to get their WiFi locked down. Shame On You will show them how easy it is to detect such a hotspot, which hopefully will motivate them to correct the issue. [BDM] was a bit worried when he learned that Adafriut already has an open WiFi detector as one of their Pro Trinket example projects. However, we think he has added more than enough features to make his project stand out.
Shame On You is using a Pro Trinket running at 3.3 volts, along with an ESP8266 WiFi module. Power comes from a LiPo battery and is handled by an Adafruit LiPo backpack. Like several other EDC contest entries, Shame On You is using a cell phone shell as a case. The display is a 1.27″ color OLED with an SD card. A disc style vibrator motor will also help get the user’s attention.
[BDM] hasn’t made much progress this last week, as he’s been battling some Christmas light cutting bandits. Logging each week’s work doesn’t always have to be technical, sometimes life intervenes!
We’re heading into our third week here in the Trinket Everyday Carry Contest, but there is still plenty of time to enter! The main contest runs until January 2, but we’re having random drawings every week! Don’t forget to write a project log before the next drawing at 9pm EDT on Tuesday, December 16th. You and all of the other entrants have a chance to win a BusPirate 3.6 from The Hackaday Store!
On occasion we advertise jobs for Hackaday but this time around is an exceptionally big deal. The Hackaday Prize was an amazing adventure this year, and we’re already hard at work on the plans for the 2015 Hackaday Prize. To realize our vision for the movement we need someone who will live and breathe THP. We need to find the Hackaday Prize Mythical Creature.
This person will hold in their mind all things Hackaday Prize. The HPMC will gallivant across the land (both digital and real) heralding the message of grass-roots, high-level hardware development. Obviously this involves recruiting highly skilled Hackers, Designers, and Engineers to compete for the prize. But the HPMC will also make sure that the amazing creations competing for the Prize get the widespread recognition they deserve.
There are a lot of nuts and bolts to the job. The HPMC will lead the planning of all live events. The many talents of the Hackaday and Supplyframe crews will be fully and efficiently tapped thanks to the legendary organizational and people skills wielded by the HPMC. Can you see why we’re calling this job candidate a Mythical Creature?
The point is, we are going to accomplish great things in 2015 and beyond. We need the perfect person to make sure it happens smoothly. Mythical Creatures, sharpen your CV’s and apply now.