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Archive: Electronics
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January 25, 2008
Molex connectors and terminal pin crimping explained
Here's a massive page on Molex connections and how to do terminal pin crimping, worth a read and a bookmark - Link.
Posted by Phillip Torrone |
Jan 25, 2008 03:00 AM
Electronics |
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Small DC motor tips
George has a great page of DC motor tips, he writes -
A small DC motor generates torque by creating an interaction between a fixed and rotating magnet field. The fixed field is supplied by high energy permanent magnets. The rotating field is created by passing a DC current through several different windings on the armature (rotating part) and timing which winding is powered through a device called a commutator. Power is applied to the armature by brushes which ride on the commutator.Small DC motor tips - Link.To understand how a motor responds to load, the motor itself is modeled by dividing it up into three major components. These components are the ideal motor, a back-EMF generator and parasitic resistance. These parts are really not physically separable, but for modeling purposes this is convenient.
Posted by Phillip Torrone |
Jan 25, 2008 02:00 AM
Electronics |
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Van Eck phreaking
Jason @ Hackzine writes -
In 1985, Wim van Eck published a paper which described how the state of a CRT monitor could be reproduced remotely based on the device's electromagnetic radiation. Van Eck or TEMPEST devices, whatever you prefer to call them, aren't just the secret sauce in your favorite science fiction, though for some reason there hasn't been a lot of amateur or open source activity here. I'm not sure why, but I suspect as software radios become more affordable, people will start experimenting more in this space.There are two open source Van Eck projects that I know of. The first, pictured above, is Erik Thiele's Tempest for Eliza project. By drawing specific black and white patterns on your monitor, Tempest is able to generate audible signals in the AM range. You can use Tempest to play an mp3 file that you can tune in on your radio.
Tempest for Eliza is a fun demo, but what about being able to read someone's monitor remotely?
There's a second open source project, called EckBox, that claims to do just this. By piping the audio from a radio through an 8-bit analog to digital converter, EckBox claims to be able to read this data from a PC parallel port and reproduce the image of an 800x600 monitor. Looking at the code, it seems almost too simple to be true. Likewise, the project hasn't been updated since June 2004 and there aren't many references or screenshots or words of success floating around the net. Anyone with a parallel port and an ADC want to give this a shot and let us know how it works?
More:
Further reading
Posted by Phillip Torrone |
Jan 25, 2008 12:00 AM
Culture jamming, Electronics |
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January 24, 2008
Arduino contest
The folks from Libelium sent in their Arduino contest, looks interesting -
It is a contest for everyone who believes in Open Hardware and enjoys hacking with Arduino. It is the time to show what you have done and share it with the Community! There are 3 different categories:Arduino contest @ Libelium Comunicaciones Distribuidas - Link.Common life hacks. Have you designed a remote-pets-feeder? A gadget for watering your plants? A GPS navigator for your bike? Or anything that makes your life easier?
Art hacks. Artistical installations, interactive objects... just show the limits of your imagination.
Robotics.The winner of each category will get one GPRS/GPS Module for Arduino. One of the exclusive and limited edition for Arduino whe are going to release.
It will let Arduino to connect to the mobile networks, make and receive phone calls, send and receive sms's!, give the GPS coordenates... A new level of modules for Arduino.
Related:
Arduino guide @ MAKE - Link.
Making Things Talk by Tom Igoe - the best book on Arduino! - Link.
Posted by Phillip Torrone |
Jan 24, 2008 12:00 PM
Arduino, DIY Projects, Electronics, Open source hardware |
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Make a push button ignition for your car
HAL 9000 writes -
When i first saw my car, sitting on the corner with a for sale sign on it. I decided that I would buy it. I did. After that I decided that I really wanted a sweet push button ignition and an engine kill switch, like a rocket or a race car or something cooler than an early nineties economy car. Well, it has been nearly a year and today i tore apart my dash, cut up some wires, soldered and drilled and figured and puzzled for about 5 hours and now, the final result, you will see in this instructable.Make a push button ignition for your car - [via] Link.I will show you how to wire in a push button ignition and an engine kill switch in your car. It's easy, as I have done all of the puzzling and figuring for you. I should take between one and two hours, depending on how fast you can take apart your dashboard. This project cost me $25 for a soldering iron, wire, one relay, two momentary buttons, and a switch. If you have some of these it will be cheaper. Either way, this is a small price to pay for such a cool feature.
Posted by Phillip Torrone |
Jan 24, 2008 04:00 AM
DIY Projects, Electronics, Instructables, Transportation |
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Waterproof APC
Who said you can't make square waves in the pool?
MAKE Flickr Pool member Rob Cruickshank created this nifty waterproof Atari Punk Console, utilizing his own custom weatherproof potentiometer design. -Link
Related:
Atari Punk Console schematics - Link
Atari Punk Console in a Light Bulb - Link
Posted by Collin Cunningham |
Jan 24, 2008 02:00 AM
Electronics, Music |
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January 23, 2008
555 timer light synth
Another 555 project today: Matt made this simple mod to the 555 circuit in Make Volume 10 to create a light-sensitive analog noisemaker, and busts out a bit of Beethoven's 9th. - Link.
Related:
Remote camera timer and 555 roundup - Link.
Posted by Becky Stern |
Jan 23, 2008 07:00 PM
Electronics |
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Voltage and temperature sensors @ Phidgets
There are some new voltage and temperature sensors @ Phidgets. Post up in the comments if you use these -
Precision Voltage Sensor -The 1123 Precision Voltage Sensor is now available. The new Sensor is 10 times more accurate than the 1117 – Voltage Sensor. The new sensor also uses differential inputs. The 1117 remains available at $15.00 CAD (a 28% price reduction) for users who do not require the 1123 accuracy.Phidgets - Link.
Precision Temperature Sensor -The 1124 Precision Temperature Sensor is now available. The new Sensor is 4 times more accurate than the 1114 – Temperature Sensor. The 1114 remains available at $7.00 CAD (a 35% price reduction) for users who do not require the 1124 accuracy.
What Are PhidgetsPhidgets are an easy to use set of building blocks for low cost sensing and control from your PC. Using the Universal Serial Bus (USB) as the basis for all Phidgets, the complexity is managed behind an easy to use and robust Application Programming Interface (API). Applications can be developed quickly in .NET, Visual Basic, VBA (Microsoft Access and Excel), LabView, Java, Delphi, C and C++.
Posted by Phillip Torrone |
Jan 23, 2008 05:00 PM
Electronics, Kits |
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LED blinks to the music
It really doesn't get any more than simple than this, hook up a LED to some speakers, crank it up and watch the blinky - Link.
Posted by Phillip Torrone |
Jan 23, 2008 03:00 PM
DIY Projects, Electronics, Instructables, Music |
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| Comments (26)
Anykits electronic kits
I haven't order anything from this site (Anykits) but they do seem to have a lot of good stuff including a PDF "magazine" with open source designs. Any makers out there familiar with these folks? - Link.
Posted by Phillip Torrone |
Jan 23, 2008 01:00 PM
Electronics, Kits |
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| Comments (25)
HOW TO - Make a remote timer for a Canon SLR (Using a 555 timer)
Rob writes -
Canon makes a SLR camera remote timer that sells for a couple hundred dollars. Using inspiration from various web sites I built one for myself using about $15 worth of parts from RadioShack.HOW TO - Make a remote timer for a Canon SLR (Using a 555 timer) - Link.First, it is a simple wired camera remote control. Just plug the cable into the remote jack on the Canon SLR camera and the black button on top will trigger the camera auto focus, while the red button will focus then take a picture.
Second, it is a timer than can be used for time lapse photography. A 9-volt source (battery or DC adapter) powers a circuit I built using a 555 timer and a 6-way rotary switch where each way is hooked up to different resistors. Switching between these different resistors varies the timer interval. The timer triggers a relay switch at specified intervals which causes the camera to take pictures.
Related:
555 timer - five boro bike tour time lapse - Link.
555 chips? Bet you can't eat just one - Link.
555 timer origami - Link.
More 555 timer projects - Link.
Make - Volume 10 - The Biggest Little Chip (Page 62) - Link.
Posted by Phillip Torrone |
Jan 23, 2008 12:00 PM
DIY Projects, Electronics |
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| Comments (1)
Reed switch computer turn-on
A reed switch is an electrical switch operated by an applied magnetic field, here's a simple how-to on using one to turn on a computer.
Posted by Phillip Torrone |
Jan 23, 2008 11:00 AM
Computers, DIY Projects, Electronics |
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| Comments (10)
CAROLL: a cheap autonomous robot for on-line learning
MAKE Flickr photo pool member Fdecomite posted up some great shots of "CAROLL" a cheap autonomous robot for on-line learning -
...conception, building and programmation of a non-expensive autonomous wheeled robot, using as few electronic parts and special skills as possible. It makes use of a cheap but strong micro-controller, with enough program and data memory to enable sophisticated learning schemes (reinforcement learning, neural networks implementation, population based incremental learningCAROLL: a cheap autonomous robot for on-line learning - Link.
Posted by Phillip Torrone |
Jan 23, 2008 06:00 AM
DIY Projects, Electronics, Robotics |
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HOW TO - Make Printed circuit boards - An illustrated guide (and round up)
Here's a good tutorial on making your own PCBs (Printed circuit boards). And below is our round up with the many other methods -
Creating Printed Circuit Boards (PCBs) is easy and fun for the whole family! But read the disclaimer -- heat and corrosive chemicals are dangerous ;-) After you've prototyped and tested your circuit design, creating a PCB will provide a sturdy and reliable backbone for your circuit and will give your project a professional finished quality.HOW TO - Make Printed circuit boards - An illustrated guide - Link.Using PCBs can even help reduce the time you spend building circuits, especially if you are producing multiple units, as you only need to follow a parts placement diagram (there's no longer any need to worry about specific interconnections).
As is usually the case, there is more than one way to do it: there are numerous ways to create PCBs. They range from the time-consumming and difficult to the fully automated and expensive. Here we will attempt to describe a method we've found ideal for small production runs (say, a few prototypes to a couple of dozen--when you reach the hundreds, it will probably be easier, quicker and cheaper to outsource) of single- or double-sided boards.
Related:
HOW TO - Direct to PCB ink jet resist printing - Link.
PCB etching - Link.
Two sided PCB using toner method - Link.
HOW TO - Turn your EAGLE schematic into a PCB - Link.
PCB making - Link.
Open source PCB design tools - Link.
PCB creation process - Link.
$30 High-speed PCB drill press - Link.
DIY Ultraviolet light source for PCB exposure - Link.
HOW TO - Make PCB's with a laser printer - Link.
HOW TO - Build a PCB router - Link.
Cheap and easy toner transfer for PCB making - Link.
PCB pictures with a scanner - Link.
Making a hand drawn PCB (printed circuit board) - Link.
HOW TO - Create your own PCB's - Link.
Make - Volume 02 - Primer: Printed Circuit Boards (Page 166) - Link (free MAKE preview, if you like it pick up a copy and/or subscribe!).
Posted by Phillip Torrone |
Jan 23, 2008 04:00 AM
DIY Projects, Electronics |
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| Comments (0)
Singer's ladder - old sewing box becomes Jacob's ladder
A Jacob's Ladder is a high voltage "climbing arc" - MAKE Flickr photo pool member made one that lives inside an old Singer sewing box, build photos and more ahead! - Link.
Related:
Jacob's Ladder project - Link.
Jacob's ladder as a 12-Gauge steel sculpture - Link.
HOW TO - Build a five foot tall Jacob's ladder - Link.
Posted by Phillip Torrone |
Jan 23, 2008 02:00 AM
DIY Projects, Electronics |
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| Comments (1)
January 22, 2008
Hack a Day $600 workbench challange
If you had $600, not including physical bench or computers, how would you trick out your hacking workbench? Hack a Day's giving away a prize to one of the best submissions. The catch: you have to spend all $600 in your proposal. - Link.
Posted by Becky Stern |
Jan 22, 2008 09:00 PM
Electronics |
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| Comments (0)
Incandescent sculpture
Dylan Kehde Roelofs creates these handblown light-up sculptures, complete with filaments and all. - Link.
Posted by Becky Stern |
Jan 22, 2008 07:00 PM
Arts, Electronics, Makers |
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| Comments (0)
BREAKING NEWS: MySkit - Performance editor for PLEO
Robert writes -
The AIBO super hackers have entered the Pleo party full strength by porting one of their most powerful and fun AIBO performance tools over to Pleo. "Skitter", a full featured skit creation tool for the AIBO designed by the AIBO wizard known as DogsBody, has now been reincarnated as "My Skit". It allows Pleo owners to create their own performances giving them control over Pleo's various motors including the ability to import existing animations from the original Pleo library, with the added capability of adding and synchronizing sounds to movements. Skits are then assigned to the various touch sensors on Pleo's body allowing them to be triggered by a touch to that location, or they can also be run automatically on startup.BREAKING NEWS: MySkit - Performance editor for PLEO - [via] Link.In this video, I show Digger, Claire, and Pendragon, my 3 Pleos, doing a skit that involves a short bit of dialogue followed by a song complete with synchronized lip movements. Each Pleo is running a skit designed just for their part with it's own animations and sounds.
I'll be releasing the files that comprise the skit so all Pleo owners can perform the skit for their friends and family and be the star in their own Pleo show. I'll also include instructions on how to set up and perform the skit along with an alternate Claire script for the ladies out there that has Claire saying "Mommy" instead of "Daddy".
NOTE: Pleo owners that don't have 3 Pleos now have a fun excuse to meet other Pleo owners and perform skits for their families and friends by holding a local Pleo Party. You can find other Pleo owners in your area by visiting the Meetup thread on the Pleo World forum.
Related:
Posted by Phillip Torrone |
Jan 22, 2008 04:05 PM
DIY Projects, Electronics |
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| Comments (1)
Full-colour RGB monome clone (Trinome?)
JMG writes in -
Here it is, the first project that I designed and executed on my own. I'm thinking of calling it the Trinome, but that's still up in the air.Full-colour RGB monome clone (Trinome?) - Link.The monome is a gorgeous, minimalist, open-source light-and-button pad used primarily by musicians as a controller. The folks over at SparkFun Electronics, inspired by the monome, released their own button pads and circuit boards, only they designed theirs to be able to hold RGB LEDs. They made this nifty Tetris game with their parts. Looking at it, though, I noticed something: they only seemed to use a limited palette, in particular, they only appeared to have red, green, blue, cyan, magenta, yellow, and white, corresponding to channels being fully on or fully off. I wanted to see if I could get colour mixing, wherein channels were on partially in order to blend colours smoothly.
Posted by Phillip Torrone |
Jan 22, 2008 01:00 PM
Arts, DIY Projects, Electronics, Music |
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| Comments (2)
RecycledEnclosure
Chris found an old External SCSI drive enclosure and re-purposed it into an embedded development platform complete with power to keep his desk a bit tidier - Link.
Posted by Phillip Torrone |
Jan 22, 2008 12:00 PM
DIY Projects, Electronics, Green |
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| Comments (2)
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