The Hack-a-Day logo challenge keeps on bearing fruit. This tip comes from [Enrico Lamperti] from Argentina who posted his follies as well as success creating a Hack-a-Day logo using a home built scanning laser projector.
The build consists of a couple small servos, a hacked up pen laser and an Arduino with some stored coordinates to draw out the image. As usual the first challenge is powering your external peripheral devices like servos. [Enrico] tackled this problem using 6 Ni-MH batteries and an LM2956 simple switcher power converter. The servos and Arduino get power directly from the battery pack and the Arduino controls the PWM signals to the servos as they trace out the stored coordinate data. The laser is connected to the servo assembly and is engaged and powered by an Arduino pin via an NPN transistor. He also incorporated a potentiometer to adjust the servo calibration point.
His first imported coordinate data generated from some Python script was not very successful. But later he used processing with an SVG file to process a click-made path the Arduino could use as map data to draw the Hack-a-Day logo. It requires a long exposure time to photograph the completed drawing in a dark room but the results are impressive.
It’s an excellent project where [Enrico] shares what he learned about using Servo.writeMicroseconds() instead of Servo.write() for performance along with several other tweaks. He also shared the BOM, Fritzing diagram, Processing Creator and Simulator tools and serial commands on GitHub. He wraps up with some options that he thinks would improve his device, and he requests any help others may want to provide for better performance. And if you want you could step it up a notch and create a laser video projector with an ATMega16 AVR microcontroller and some clever spinning tilted mirrors.
[Toymakers] shared another episode of The Rabbit Hole. In this episode they spend most of the time pawing through boxes of donated electronic goodness. What really sparked our interest in episode 044 starting at the 12:46 mark was their amazing new logo proposal for The Rabbit Hole Hackerspace. The logo looks a bit familiar and is indeed based partly on the Hack a Day logo, but this unique and awesome logo also sports the open source hardware gear as well as an evil looking punisher style rabbit.
Sure we might like it a bit more because of its resemblance to our logo; nonetheless this is a great-looking logo and perfect for their hackerspace. We hope they go with it, who doesn’t love evil rabbits? The background to the logo is also a barcode which when scanned takes you to The Rabbit Hole website. [Whiskers] also re-renders the logo to port over to their CarveWright CNC wood router to make up a 3D logo plaque, SWEET! You might remember we did get a glimpse of their table-top CNC router as a Hackaday Hackerspace Henchmen entry.
You can watch all of episode 044 after the break and don’t forget to comment below to let us know if you like their new proposed logo, we do. Maybe we will be reporting on a future “T-shirt campaign” :)
Continue reading “The Rabbit Hole Hackerspace Sports a New Logo”
It’s no secret that we love to see project demos that pander to Hackaday. This often comes in the form of our page loaded on the screen in build photos, or creative use of our skull and wrenches logo. Now’s your chance to pander for a smidge of loot. [Phillip Torrone] offered up 20 of Adafruit’s new 5v Trinket boards as giveaways, and we can’t say no to getting free stuff in the hands of the readers.
So here’s the deal: Use the Hackaday logo on something. This can be just about anything. The images above show three examples made by Hackaday staff. There’s the logo built brick-by-brick on a Minecraft Survival server, a 3D version printed as a badge, and a somewhat squished version inside of a QR code. We will (seemingly arbitrarily) pick twenty winners from all of the submissions, but here’s a few guidelines to help you rise above:
This contest is over, thanks to all who sent in their work!
Send your submission details to our tips line (don’t forget to say something like [Trinket Contest] in the title!). In order to receive a prize you must include your name, address, and email address (these will only be used by Adafruit to deliver the hardware and notify you when it has shipped). Get your entry in by Friday, November 1st in order to qualify. Obviously Hackaday, SupplyFrame, and Adafruit employees and their families aren’t eligible to win.
Children of the 80s may remember the Big Trak, a six-wheeled programmable toy designed to explore distant planets on the other side of the living room and the vast expanse of a two-car garage. The Big Trak was re-released a few years ago and [Nathan] took quite a shine to this improved version. He was so enthralled he decided to upgrade it even more to support the LOGO programming language.
The 30-year-old version of the Big Trak had a membrane keypad where commands such as ‘drive forward 5 units’ and ‘turn 90 degrees’ can be saved and run from memory. This is very similar to the LOGO programming language with and turtle graphics and nearly identical to the Roamer LOGO robot.
To control the Big Trak, [Nathan] upgraded the electronics to a ChipKit Uno and a BeagleBone. A LOGO interpreter written in Python and uploaded to the BeagleBone. After this, [Nathan] was nearly set. He did add a WiFi interface to control his Big Trak wirelessly, a nice touch we think.
You can check out [Nathan]‘s twenty-minute build video where he goes through the entire process of upgrading his Big Trak after the break.
Continue reading “Turning the Big Trak into a Turtle”
After writing this post on somone hacking QR codes, Hack A Day commenters came out in full force posting some really cool links about modifying QR codes to include a logo. I’ll fully admit I geeked out a little, but in the process I figured out some of the theory behind embedding logos in QR codes.
After getting my hands on the ISO 18004 specification for QR codes, I decided to try embedding the Hack A Day skull & wrenches inside a QR code. The tools I used were Photoshop, this QR code generator, and Microsoft Paint (I’ve never seen a program to edit individual pixels that has a better UI, so don’t laugh).
Continue reading “How to put your logo in a QR code”
The Open Source Hardware (OSHW) initiative is rolling right along. But now it’s time for you to share your input. The movement is choosing a logo and you get to decide which one it will be. The ten finalists shown above were narrowed down from the 129 submissions received during the public call for logos. The thought is that any time you have a new project which fits the OSHW definition you can slap this on the project page, or silk screen it right on the PCB (although OSHW applies to more than just electronic projects). A picture says a thousand words you know.
Voting ends April 5.
[via Evil Mad Scientist]
Happy Halloween to one and all. Let’s celebrate the holiday with some related links.
[Brandon] carved the Hackaday logo into his Jack-’o-Lantern. But that’s not all, inspired by EMSL’s Jack-’o-Lantern, as well as our own offering, he added LEDs. Three of them occupy the flesh behind the eyes and nose, fading in and out thanks to some pulse-width modulation that an Arduino provides.
Mad Scientist Blinken Costume
[Bill Porter] is getting down with the LEDs by making a Mad Scientist costume. The accent jewelry is an LED matrix necklace that he made himself to go along with 76 of them sewn into the coat. Also joining the party is over one hundred feet of wire and two Arduinos.
Dole Out Candy Via Twitter/Phone
Apparently [Noel Portugal] will be too busy hacking together his next project to dish out candy on Halloween. To make up for his double-booked schedule he built an automated candy dispenser. Just tweet your request and the bucket will open a hatch from which candy will fall. There’s also an option to activate it with a voice call, or just slap that red button until your blood sugar reaches an adequate level.
Star Wars Pumpkins
[Charles Gantt] carved Yoda’s mug into his pumpkin and backlit it with green LEDs. Someone else paired two together for a Death Star shoots Alderon scene [via Reddit]. If those aren’t enough for you there’s a Star Wars top 10 collection out there somewhere.
Now go start working on next year’s props!