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Archive: Electronics
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November 13, 2007
Bluetoothing a Trash 80
Remember ye ol' Radio Shack TRS-80 Model 100? I used one long after their heyday (when laptop really still meant luggable and battery life was a joke). This thing had wordpro, calendar, a term program, built-in modem, and it ran FOREVER on 4 AA batteries. Eric Gradman recently played a great prank on a new hire at work. He writes on Flickr:
The TRS-80 can run on batteries (this was a major selling point when it was released), but its designers forgot to add wireless capabilities.I have corrected this shocking oversight by soldering a BlueSMIRF module available from Sparkfun Electronics directly to the HD-6502 UART on the motherboard.
My MacBook pairs with the Bluetooth module and exposes its remote TTL level UART as a device file. I use screen to open this device file, and exec "telnet" to my host of choice.
When Sam walked in this morning, I handed him his TRS-80 laptop with a working login screen to the Linux box... but the TRS-80 was completely untethered!
BTW: The Model 100 still has an active user community, such as the Club 100 user's group.
TRS-80 Bluetooth photoset - Link
Posted by Gareth Branwyn |
Nov 13, 2007 11:34 AM
Electronics, Retro |
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| Comments (6)
Alpha (spoke) POV
Tristan Roddis of blog.cogapp.com writes:
Following the great instructions from Evil Mad Scientist Laboratories, I built one, and then reprogrammed the chip to create a crude persistence of vision device, which could then be velcroed onto my spokes for use as a propaganda tool during the Critical Mass bike ride.
Hardware hacking - the next frontier? - [via] Link
Posted by Gareth Branwyn |
Nov 13, 2007 08:23 AM
Bicycles, Electronics |
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| Comments (2)
Two-motor quadcore BEAM walker
We've talked about bicore nervous net BEAM circuits in the pages of MAKE. This two motor walker uses four "neurons" in its brain and is therefore called a quadcore. It's basically two linked, oscillating signals that create a four-legged walking gate over the two motors. Two photodiodes make the walker light-seeking (or.. um .. shadow avoiding).
2 motor 4 leg shadow avoiding quadracore - [via] Link
Posted by Gareth Branwyn |
Nov 13, 2007 06:00 AM
Electronics, Robotics |
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Wavetable synth on an ATtiny45
A Make: Blog reader, garydion, posted this in response to my Making Arduino sing piece:
On the topic of music on microprocessors, be sure to check out this site
where a wavetable synthesizer is programmed into an Atmel ATtiny45.
Amazing! I had to download the code and program a chip to confirm it
really does sound that good. And it does. Enjoy!
Wavetable Melody Generator - Link
Posted by Gareth Branwyn |
Nov 13, 2007 05:00 AM
Electronics, Music |
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| Comments (0)
November 12, 2007
Java-powered pumpkin
The Alchemist created a great Java-powered pumpkin project:
The Cluster team is legendary on the MPK Campus for throwing the best Halloween parties [photos]! One of the featured activities is the Pumpkin Carving Contest. This popular event provides the staff with a fun and frivolous outlet for their creative skills. My prize-winning entry last year was Project Orangebox, a parody of Project Blackbox.
I was stumped this year to think of a design to top last year's entry... until I remembered the Sun SPOTs! Sun SPOTs are nifty wireless sensor devices being developed at Sun Labs. They are small but powerful, fully programmable (in Java), and can do most jobs that call for a microcontroller. I decided a SPOT would make the ideal engine to drive my pumpkin. This was a far more ambitious and technically difficult project than Project Orangebox, but with the help of several engineers in Sun Labs, it was successful!
This is a very cool project. It uses the Sun SPOT development kits, which are actually a much better deal than I expected. For $550, you get three ARM9 boards, one that's set up as a base station (USB-powered, with 802.15.4 radio) and two standalone ARM9 nodes (battery, sensors, radio). You can buy a pile of Arduinos for that price, though. But if you're a freak for microcontrollers, this is a worthy addition to any geek's collection of gadgets. Project SPOTkin - Link
Posted by Brian Jepson |
Nov 12, 2007 09:00 AM
Electronics |
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Winners of the Circuit Bending Challenge
Peter Kirn of Create Digital Music Writes:
We've completed the Circuit Bending Challenge, a collaboration between CDM
and GetLoFi. In just one day, people whipped up wild and crazy circuit-bent
creations, from zombie Jesus to gun zapper things, playing guitars and
keyboards, an infant performing circuit-bent music (really), the requisite
bent Furby, and more.
Create Digital Music - Link
Posted by Gareth Branwyn |
Nov 12, 2007 05:00 AM
Electronics, Music |
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| Comments (1)
November 8, 2007
Virtual pilot video rig for R/C plane
Check out this awesome Google vid of a gyro-stabilized camera rig with a video headset for an R/C plane. It puts you in the cockpit and the camera moves around as you move your head. And most amazingly, it uses all off-the-shelf parts.
Bromont golf club - [via] Link
Posted by Gareth Branwyn |
Nov 8, 2007 02:00 PM
Electronics, Flying |
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| Comments (5)
Roomba 500 series open interface
iRobot published the 500 series (New Roomba) open interface specs, this is GREAT news and I'm thrilled that iRobot keeps opening up the interfaces for their fantastic robotic vacuums - Link (PDF).
Related:
HOW TO - Roomba Bluetooth Interface - Link.
HOW TO - Make a Roomba Serial Interface - Link.
iRobot 500 series - Link.
Open source hardware, what is it? - Link.
More:
Tons and tons of Roomba projects - Link & Roomba Hacking from our pal Todbot - Link.
Posted by Phillip Torrone |
Nov 8, 2007 05:00 AM
DIY Projects, Electronics, Open source hardware, Robotics |
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DIY Enclosures
I haven't used these folks but their selection is really impressive. Might be worth checking out if you need to make or build an enclosure for a project... -
Over 600 unique combinations of options are possible when you choose the DIY-1712 chassis, our most universal chassis. These options include: three base styles, 6 front panels, 8 different knobs, ventilated or blank top panels, and blank, or IEC-cutout rear panels. Our chassis are designed to accommodate both solid state and tube-based equipment, by providing you with the option of a .050" (1.3mm) ventilated top panel, or a blank .080" (2mm) top panel.DIY Enclosures - Link.
Posted by Phillip Torrone |
Nov 8, 2007 04:00 AM
Computers, DIY Projects, Electronics |
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| Comments (2)
DIY IR widget
Handy dandy DIY IR widget -
The IR Widget captures the infrared signals used by remote controls. It operates in a way that makes it compatible with modern multitasking operating systems. It is able to determine the carrier frequency and demodulate the carrier in the digital or analog domain. The captured information can be used to view, recognize or reproduce the signal. The hardware is designed to be as simple and low cost as possible. A PIC12F629 was used for development, but almost any PIC that uses the 12 or 14 bit instruction set could be used. There are also 74HC based circuits for Luddites who refuse to use microcontrollers.DIY IR widget - Link.
Related:
HOW TO - Make a Nikon D70 IR remote control - Link.
HOW TO - Fuji FinePix 2300 IR modification - Link.
DIY IR PaintRemover - Link.
Ultra TV-B-Gone - 20 IR LEDs + 9V = 90 ft range! - Link.
HOW TO make a USB IR receiver - Link.
HOW TO - Make an IR remote for WinAmp - Link.
Posted by Phillip Torrone |
Nov 8, 2007 12:00 AM
DIY Projects, Electronics, Wireless |
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| Comments (1)
November 7, 2007
DIY Light up hat
MAKE Flickr photo pool member Yang02 made a cool hat, I'm not exactly sure what it does but it appears to light up when it gets dark, it might also blink - Link.
Posted by Phillip Torrone |
Nov 7, 2007 07:00 PM
Electronics, Wearables |
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| Comments (4)
Musical Caps Lock prank
How to wire a greeting card sound chip to a keyboard key on a mark's computer. Hilarity (or an ass-whipping) you can bank on.
This is basically the same hack we blogged about before (see below), but these instructions hold your hand a bit tighter.
How to make a prank musical caps-lock keyboard - Link
Related:
- HOW TO - The Singing Keyboard prank - Link
Posted by Gareth Branwyn |
Nov 7, 2007 04:00 PM
DIY Projects, Electronics, Interviews |
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| Comments (5)
HOW TO - Make your own 360 panoramic photo robot
Patricio sent in the construction of his photo panoramic robot, it shoots 60 photos for a complete 360 degree view... - Link.
Posted by Phillip Torrone |
Nov 7, 2007 12:00 PM
DIY Projects, Electronics, Imaging, Instructables, Robotics |
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Guitar Hero mods
Here are a bunch of Guitar Hero mods!
Another real Guitar Hero - Link.
Ultimate Guitar Hero mod - Link.
HOW TO - Build your own custom full-sized wireless ... - Link.
HOW TO - Make a DIY PS2 Guitar Hero controller - Link.
Guitar Hero + Commodore 64 - Link.
Wireless Guitar hero PS2 controller mod... - Link.
Left handed Guitar hero mod & more mods! - Link.
Guitar Heronoid - Android plays Guitar Hero - Link.
Posted by Phillip Torrone |
Nov 7, 2007 11:00 AM
DIY Projects, Electronics, Gaming, Music |
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| Comments (6)
JCM800 2204 amp build
Joe made this MASSIVE site to help people build a JCM800 Guitar Amp from scratch! - Link.
Posted by Phillip Torrone |
Nov 7, 2007 10:00 AM
DIY Projects, Electronics, Music |
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| Comments (1)
The RFID Guardian project
All you need to know about joining on making a personal RFID firewall -
The RFID Guardian Project is a collaborative project focused upon providing security and privacy in Radio Frequency Identification (RFID) systems. The goals of our project are to:
- Investigate the security and privacy threats faced by RFID systems
- Design and implement real solutions against these threats
- Investigate the associated technological and legal issues
The namesake of our project is the RFID Guardian: a mobile battery-powered device that offers personal RFID security and privacy management. One the focuses of our project is to build an RFID Guardian prototype.The RFID Guardian project - [via] Link.
Related:
Build a RFID reader/capturer/cloner - Link.
Interview with RFID implanter- Link.
RFID enabled flame shooting trampoline - Link.
MAKE VIDEO PODCAST - Getting "Chipped" - Interviews ... - Link.
RFID experimentation kit - Link.
Make an RFID Sheilding Wallet out of Trash - Link.
HOW TO - Homemade RFID reader - Link.
From the pages of MAKE:
RFID for Makers - RFID for Makers. Build this kit to read radio frequency ID tags. Subscribers--read this article now in your digital edition or get MAKE 06 @ the Maker store - Link.
Posted by Phillip Torrone |
Nov 7, 2007 06:00 AM
Electronics, Wireless |
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| Comments (0)
November 6, 2007
EL soldering basics
This Instructable gives you the skinny on soldering electroluminescent (EL) wire.
How to Solder EL (Electroluminescent) Wire - Link
Related:
- Electroluminescent butterfly night-lights - Link
- Make a Glowing, Wearable, EL-Wire, Blinky Light... - Link.
- EL wire barbershop pole... - Link.
- The EL lamp project - Link.
- EL wire projects on MAKE - Link.
Posted by Gareth Branwyn |
Nov 6, 2007 06:00 PM
Computers, Electronics, Instructables |
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| Comments (0)
Arduino Wireless POV
Today is POV day it seems... Oscar writes -
Here is a cool project from Spain featuring an Arduino POV and some 433Mhz Wireless modules. This project includes an IR sensor to auto-calibrate the display timing on each complete loop. This allows for very accurate precision and stability when drawing on the air! This Arduino POV is based on a old floppy disk enclosure and a old CD-ROM driver and an old car-radio for the main DC motor. Cheap and fun! I'm improving the wireless code to control text from PC to the board remotely connecting together to a USB port.Arduino Wireless POV - Link.
Posted by Phillip Torrone |
Nov 6, 2007 01:00 PM
Arduino, DIY Projects, Electronics |
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| Comments (1)
Laser POV projector
Cyenobite writes -
Hey makers! This past weekend at the MakePhilly event, Joe showed off a really cool device that he made. In a nutshell he created a laser POV projector out of parts that came in at less than $100. I thought other makers would appreciate his creative project too.Laser POV projector - Link.
Posted by Phillip Torrone |
Nov 6, 2007 12:00 PM
DIY Projects, Electronics |
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| Comments (3)
HOW TO - Build your own two-photon microscope
Here's how to build your own laboratory microscope and see really really really small things! Includes diagrams and instructions - Link.
Posted by Phillip Torrone |
Nov 6, 2007 11:00 AM
DIY Projects, Electronics, Science |
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| Comments (0)
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