This new app can identify your resistors for you, from hackaday.
Need a quick and easy way to sort through a few hundred random resistors? You could do them one at a time by reading the color codes yourself… or you could get a machine to do it for you!
When [Robert] was faced with a pile of unsorted resistors he quickly decided he did not have the patience to sort them manually. So, he started by writing an Android app using OpenCV to detect and identify resistor color codes. The problem is, most phones have trouble focusing at short distances — and since resistors are so small, holding the phone farther back results in color rings only being a few pixels wide — not the greatest for image recognition!
So, he started again on his computer, using a cheap LED-lit webcam instead. He wrote the app in java so he could re-use parts of the code from the Android app. It seems to work pretty well — check it out in the following video! This would be perfect to pair up with your illuminated storage bin hack.
Lifehack pointed out this useful tool which could be very helpful for any type of wearable or electronics project!
When it comes to arts, crafts and DIY projects, glue is a very handy item to have within reach; it can be used on fabric, glass, wood, leather, plastic and more. If you’re not familiar with all the different types of glue, it can be really hard to decide which one to use for your specific job or project.
Glue Guide is a free resource that helps you find the right glue type for whatever you’re working on. In just two steps you can find the perfect glue and see which forms it’s available in (squeezable tube, brush on applicator, etc). You’ll need to know the type of conditions you’ll be gluing in such as indoor, outdoor, dirty or oily.
Actress turned mathematician Danica McKeller has come out with a new video series called Math Bites. The first episode is focused on everything pi! Via Nerdist.
Ready for a piping-hot slice of pi? Of course you are! Last month you bathed in the irrational goodness of the Dance of the Sugar Pi Fairy, and as promised, today is the series premiere of actress and bestselling author Danica McKellar’s Math Bites, a brand new series on the Nerdist Channel that kicks ass, solves for X, and chews bubblegum! And Math Bites is all out of bubblegum.
Studies show that 99% of humans hate math. Danica McKellar (Math Doesn’t Suck, Kiss My Math) is the other 1%. Math Bites is exactly what it sounds like — bite-sized bits of mathematical magic that are easy to digest so you won’t wind up like the protagonist of Darren Aronofsky’s Pi. Speaking of pi, today’s episode focuses on the mysteries of everyone’s favorite irrational number and seeks to take the daunting, never-ending number and make it so you not only understand it, but can sing its digits to 139 places. Bet your SAT prep course didn’t cover that.
ThinkGeek has a cute gift idea for all those kids out there that love to play Minecraft.
Minecraft is addictive, and as such it already eats kids’ homework by distracting them for hours. But now kids can claim the Creeper ate their homework for real as they open up this backpack to reveal their books, assignments, lunch, and more.
Here’s a quick way to back up all of your main data files from flicker user Alan Potter. Great for backing up music and video!
Top of the stack, the Raspberry Pi itself. It’s a little computer that runs Linux, and is built around the CPU that you would probably normally find in a Smartphone. It boots off the 16GB SD card that protrudes from the front of the clear plastic box. But heck, it’s probably about as powerful as the awe-inspiring Sun workstations I used at Uni. And in truth, that’s about the last time I used Unix seriously, so this has been a learning exercise. I am re-learning loads of stuff about things like /etc/fstab that I had thought was gone forever!
Below that, the main backup disk. 4TB – 4TB! – of ext4 goodness. Connected over USB2 to the Pi, it will take a fair while to fill it, but I am already worried it will be too small. Anyway, this will back up al of my data and my RAW files, with Oops!Backup running on the PC and providing Time-Machine like functionality.
And below that, another USB connected disk. This will store my music and video files, and in turn will be backed up onto my desktop PC. I’ll put a DLNA server and an iTunes server onto the Pi, and allow the files to be served to any computer in the house (installing and configuring the servers is an adventure I have yet to face).
Mini 3-wire Volt Meter (0 – 99.9VDC) – Put a voltage meter anywhere with this very handy display. These are often used by RC hobbyists for keeping track of batteries but we thought it would be great on a breadboard or enclosure. This is the 3-wire version of the volt meter, two wires are used to power it and the third wire is used for measurement. We also have a 2-wire version that measure it’s own power supply. Simply connect the red wire to a positive power supply from 4.5 to 28VDC, and brown or black to the common ground to power the display. Finally, connect the orange or white wire to whatever you want to measure the voltage of. The display has a microcontroller that will read the voltage, compare it to a stable reference and display the voltage with 0.1V precision on a 3-digit 7-segment display. it can read from 0V to 99.9VDC so it will be good for any electronic project! The meter draws 3-4mA to power the microcontroller and display. This particular LED display is a nice vivid green, which we found very readable. Mounting tabs make this module easy to attach to any box or plate.
Today, Alberto announced that ABC - THE BOOK will have online tutorials and code examples dedicated to every page. Alberto explains that page will have a special shortened link (for easy typing) to the associated on-line tutorials and examples.
Adafruit forum member Alberto Piganti (pighixx) is well known for his clear and easy to read circuit and pinout diagrams and his “ABC” Arduino Basic Connections website. Now he has started an Inidiegogo campaign to collect these diagrams together into “Arduino Basic Connections – The Book“. He was kind enough to send me the preview copy pictured above.
Arduino Basic Connections is a compact book – it won’t take up much space on your bench. But the well-laid out color-coded graphics on heavyweight coated (coffee proof!) paper are easy to follow. The cover folds out to reveal pinout diagrams for the Arduino and Atmega processors. The rest of the book is divided into 6 sections with color coded tabs for: References, Inputs, Outputs, Audio, Displays and Advanced.
I can see this book will get a lot of use. I’ve already signed up for a couple more copies for my robot team!
Swedish company Bookman is launching LED bike lights that recharge using a USB cable. The separate USB cable allows for tiny, battery free lights that fit easily into your pocket and can clip onto your bike. On flash mode the lights run for 20 hours. They’ll be available to ship at the end of the month. via coolhunting.
This model is 10 Watts and has 6 selectable outputs ranging from 3V to 12VDC and up to 1.5A output. It has a 2-prong plug, but takes 110VAC to 240VAC so you can use it anywhere with a simple plug adapter.
It comes with a range of tips, such as 2.5mm mono, 3.5mm mono, 5.5mm/2.5mm, 2.5mm/2.1mm, 4mm, etc. You could use this with just about any device or project, it’s very handy!
Multi changeable plug DC-cord.
Universal AC input 100V to 240V, 50Hz/60Hz
Universal AC input plug available (BSI, USA, Europe, Aust)
6 selectable outputs: 3V-12V MAX. 1500mA.
Over load, over current, over heat protection.
International approval CE EN60950, UL1950, CSA22.2 No.950.
EMC approval EN55022.
Extra low consumption during standby (about 8% of linear adapter).
Weight: 86g approximately.
Small size: 67x29x74mm.
Cable length: 1.54m / 60 3/4″
Below is the voltage current table and avoid higher loads!
photos by Pipe Yanguas via thisiscolossal. We know we might overshare Miami artist Federico Uribe‘s work, but he’s at it again, this time making an oriental rug out of discarded computer parts, and the results are stunning.
Don’t let your luddite pet claim she never benefitted from human technology. Commercially available automatic cat feeders have been on the market for a while, but when Jonathan Foote was disappointed by the available selection, he rigged a jelly bean dispenser to release some kibbles to his favorite feline while he was out. Following instructions from EvilMadScientist, he attached a relay board to a remote control on a timer and voila! kitty gets fed on time, even if he’s gone to Timbuktu.
NEW PRODUCT! E1115 PS/2 Keyboard to TTL Serial Converter – The E1115 PS/2 Keyboard to ASCII Converter is a single chip solution dedicated to producing a single TTL ASCII character on the “press” of a keystroke. It is designed to offload the process intensive complex keyboard decoding of PS/2, allowing the host microcontroller to better allocate its resources. The output is a selectable TTL serial or a clocked serial data with interrupt signal.
Plug in a PS/2 Keyboard in one end, and you can type away, with 57.6K or 115.2Kbaud (pin-selectable) TTL spit out of the TX pin. This can make adding a UI much easier for many projects where you can’t sit around and wait for the interrupts from the keyboard port. Please note that we’ve tested it and it works great with our PS/2 keyboard but it does not work with our PS/2 Magstripe reader or the PS/2 Touchpad.
Comes as a ready-to-go pre-soldered and tested module.