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Archive: Electronics
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July 17, 2007
Antique tech treasure-trove
If you're a fan of antique tech, especially radio gear from the first half of the 20th century, and you're unfamiliar with Steve's Antique Technology site, man are you in for a treat. This site is loaded with pics and document-scans of radios, tube test equipment, meters, you name it. He especially has lots of material on Supreme-brand test equipment (as pictured above). Steve also sells tubes, other components, old radios books, and even some antique gear. A must-bookmark.
Steve's Antique Technology - Link
Posted by Gareth Branwyn |
Jul 17, 2007 09:00 PM
Electronics, Gadgets, Retro, Toolbox |
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TSA and electronics
A tale about homemade electronics, specifically an iPod charger and TSA, Damon writes -
I tell him it is a battery charger for my iPod. He asks if I made it myself, to which I reply that I purchased a kit over the internet. He says that he can't let me on the plane with it. I explain to him that I have flown with it 4-6 times a month for a year now and nobody has questioned it. He says, "Not on my watch and not with my people."My Encounter with the TSA - Link.He swabs the device and runs it through the calorimeter. Again, no residue.
I ask why it can't be taken on the plane and he said, "Because it looks like an IED." Now, I agree it looks suspicious, but the machine found no traces of explosives, and the device wasn't big enough to do any damage.
...He tells me to sit down and he checks my feet. I was about to make a joke about him giving me more attention than my wife when Donna comes over and sits down next to me. She asks what the thing is, I tell her it's a battery charger. She asks why I have it, and I begin to explain that the iPod only has about 2 hours of video time, but with the MintyBoost! I can get about 20 hours of video time. I explain that the airport commute and the airplane flight take a few hours...
She interrupts me and says she doesn't like the look of it. She starts in with the typical, "In these times..." excuse for the concern.
I fly with a lot of electronics and so far nothing like this has happened, but I think it's worth reading the entire story (he eventually did get on the plane with his gear).
Posted by Phillip Torrone |
Jul 17, 2007 01:00 PM
Electronics |
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Vintage computer kits
Jason writes -
Relive the glory (gory?) days of early computing with these two great sites for vintage computer kits. Briel Computers has kits for the Apple I (Replica I) and the Kim-1 (Micro Kim). And, Spare Time Gizmos has a has a kit for the Cosmac ELF (ELF 2k). These kits are great ways to learn the basics of computer architecture and data organization.
Posted by Phillip Torrone |
Jul 17, 2007 10:00 AM
Computers, DIY Projects, Electronics, Kits, Retro |
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Simple homemade tilt activated switch
imagitronics writes -
I started working on my next project tonight and realized that I needed four tilt activated switches. I wasn't exactly sure what would make a good tilt switch. The majority of online videos and tutorials for tilt switches were either undocumented, mercury based, or actually accelerometers. Luckily I found these small steel hooyahs. I have no idea what they were actually designed for, but they make pretty handy little switches.Simple homemade tilt activated switch - Link.
Posted by Phillip Torrone |
Jul 17, 2007 08:00 AM
DIY Projects, Electronics, Music |
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The DIY set-top box in an altoids tin event @ MAKE/ETSY
Just a quick reminder. If you're in the neighborhoo tonight, it would be great to see you at the Y-box solder-up! - Link & directions.
Posted by Phillip Torrone |
Jul 17, 2007 07:00 AM
DIY Projects, Electronics, Events |
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Doublet amplifier
Sam writes -
A few weeks back I wrote up a blog about the Doublet Headphone Amplifier which lets two people listen to the same audio source with independent volume controls. I got so many emails from folks who were interested in building one that I decided to make another run of the printed circuit boards - and they've arrived!Doublet amplifier - Link.If you want one of the PCBs, email me with your mailing address and I'll drop one in the mail to you at no charge. You'll have to supply the parts and the Altoids tin.
Posted by Phillip Torrone |
Jul 17, 2007 05:00 AM
DIY Projects, Electronics |
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July 16, 2007
Music key display
The latest Gadget Freak shows you how to make a music key display -
There was dissonance in the church when the pianist and other musicians had to hunt for the key their Music Leader was playing in. Dick's gadget took the guesswork out of the guitar, the meandering out of the mandolin and the pondering out of the piano. The Music Leader communicates the key to the others by setting the display on his Sending Unit via pushbutton or the foot switch, and the Remote Units replicate that display for everyone else. Now, they're all in one A chord (or F, or C, or...).HOW TO - Make a music key display - Link.
Posted by Phillip Torrone |
Jul 16, 2007 01:00 PM
DIY Projects, Electronics |
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Identifying electronic components
David writes -
How-to identify and locate information for electronics components you can recycle from discarded gadgets. Brandon gives us example pictures and descriptions for most types of electronics components to help you stock up your home electronics lab. This is a must read for new electronics hobbyest.Identifying electronic components - Link.
Posted by Phillip Torrone |
Jul 16, 2007 12:00 PM
DIY Projects, Electronics |
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Virtual Cogs - Portable computing-gaming platform
Here's a portable open gaming platform called "Virtual Cogs" based around the LCD screen from a PSP. Originally intended as a demonstration, they seem to be willing to make some for interested hobbyists. They have also started adding things like cameras and a GPS to it, Thanks David! - [via] Link.
Posted by Phillip Torrone |
Jul 16, 2007 11:00 AM
DIY Projects, Electronics, Gaming |
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Space invaders clock
Jason made a DIY space invaders clock using propeller-generated video on a vintage Sony tv, he writes-
I started out today with the goal of just displaying the time digitally, but I got sidetracked with the idea of representing the time with icons instead. I ended up going with this spacer invaders concept, using the number of aliens to represent minutes (0-59) and the extra lives represent hours. The last 4 digits of the high score also read out the time.space invaders clock - pr0jects! - Link.This is double-buffered, flicker-free video being generated by a propeller chip. Unfortunately the double-buffering uses up a ton of chip ram and I may have to scrap it to add more features eventually.
Posted by Phillip Torrone |
Jul 16, 2007 01:00 AM
DIY Projects, Electronics, Gaming |
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AVR Oscilloscope clock
The AVR Oscilloscope clock from Dutchtronix was covered here @ MAKE before, but I finally got around to building one - it's great. Makes an awesome clock out of an oscilloscope. Not bad for $35... Above are some pictures from the build! It's not actually supposed to work on a digital scope, so this was an experiment - and it worked!
This AVR Oscilloscope clock is available as a kit, using all through-hole components. The kit included ALL components necessary to assemble the board shown below, including a preprogrammed ATmega168 microcontroller. It does not include an oscilloscope. It also includes connectors for the Power and RS-232 headers on the board. The user can use these connectors to build the power and serial communication cables.AVR Oscilloscope clock - Link.
Posted by Phillip Torrone |
Jul 16, 2007 12:00 AM
DIY Projects, Electronics, Kits |
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| Comments (2)
July 13, 2007
Servo tester
Here's a pretty good servo tester, it's pretty hardcore -
The Servo Tester 2 is hardware and software that, basically, makes a pulse width signal between 1 and 2 ms. This is the signal used to control common R/C servos. There are numerous servo tester construction articles on the Internet. This one has some advanced features, not usually found on servo testers.Servo Tester 2 - Link.
Posted by Phillip Torrone |
Jul 13, 2007 07:00 AM
DIY Projects, Electronics |
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Aussie RocketCam
Here's a great page documenting the Aussie RocketCam model rocket flight -with- 2.4GHz inflight video link! - Link.
From the pages of MAKE:
Rocket-Launched Camcorder. Hack a $30, single-use camcorder to make it reusable, then launch it up in a model rocket and capture thrilling astronaut's view footage of high-speed neighborhood escape and re-entry. MAKE 07 - Page 78. Subscribers--read this article now in your digital edition or get MAKE 07 @ the Maker store.
Posted by Phillip Torrone |
Jul 13, 2007 06:00 AM
DIY Projects, Electronics |
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RGB LED controller
Here's a nice PIC controlled LED lamp...
The original RGB PWM driver application that I wrote in 2004 had a few shortcomings. Probably the biggest was that it was not easy to add to or change the sequences. This new version addresses that problem, is more flexible and now includes the ability to put the PIC to 'sleep' and 'wake' it again using the sequence select switch, eliminating the need for an on/off switch in battery powered applications.RGB LED controller - Link.The circuit uses (RGB) Red, Green and Blue high brightness LEDs that are pulse width modulated (PWM) to vary the intensity of each colour LED. This allows effectively any colour to be generated with rapid changing strobe effects, fast and slow colour fades as well as static colours. The data used to set and change the colours is held in an easy to edit file so if you don't like the sequences provided with it, you can modify the sequence data include file yourself and reprogram with your own sequences.
The code can be assembled for use with the following PICs: 12F629, 12F675, 12F683. Just select the correct processor in the MPLAB IDE before assembling.
Posted by Phillip Torrone |
Jul 13, 2007 05:00 AM
DIY Projects, Electronics |
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| Comments (1)
Basic digital sound devices
Fun with sea moss has a lot of good starters and projects for making basic digital sound devices, bleep bloop - Link.
Posted by Phillip Torrone |
Jul 13, 2007 04:00 AM
DIY Projects, Electronics, Music |
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| Comments (1)
K-502 Tube amplifier kit
Giovanni writes -
Scott Bartlett has put together a fantastic looking tube amplifier. The tube amplifier kit is the popular and inexpensive K-502 tube amp kit.K-502 Tube Amplifier Kit - Link.
Posted by Phillip Torrone |
Jul 13, 2007 03:00 AM
DIY Projects, Electronics, Kits |
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| Comments (0)
Conductive thread
This conductive thread is for fencing, but @ $15 per 200 yard spool it might be a good deal for projects - Link.
Related:
Soft Circuits - Link.
Posted by Phillip Torrone |
Jul 13, 2007 02:00 AM
DIY Projects, Electronics |
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The MyCPU - Homebrew computer
Dennis writes -
The MyCPU is a "Central Processing Unit" that is completely built with discrete logic gates. Over the years the project has grown, and now the MyCPU is the heart of a real Personal Computer. The computer has the following capabilities and features:
- All is build with 74HCxxx circuits. No higher integrated parts are use (except the EPROMs, RAMs and UARTs).
- The system runs with up to 8 MHz
- available hardware: 8 Bit CPU at 8 MHz (the "MyCPU"), 1.03 MB RAM / 128 KB ROM, Interrupt Controller, Multi-I/O with 2 serial ports, 1 printer port, LCD and PS/2-Keyboard interface, IDE-Controller for 4 harddisks, VGA graphic card.
- available software: DOS-like operating system, games, disk tools, programming tools, TCP/IP-stack, web server
- The computer can be programmed in basic, assembler and "C". The basic-interpreter is integrated into the operating system, and the assembler is an executable that is loaded from disk and translates the assembly syntax into binary code on the MyCPU. The C-Compiler is a cross-compiler that runs on a Windows or Linux based host system.
- The realtime operating system "pico]OS" has been ported to the MyCPU. Applications for pico]OS can be written in "C". This is a good starting point for education purpose.
- The project is totally open source.
Posted by Phillip Torrone |
Jul 13, 2007 12:00 AM
DIY Projects, Electronics |
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July 12, 2007
Carl & Jerry - A hot idea
Jeff sent in another Carl & Jerry, adventures in Electronics, this one shows you how to build a thermistor anemometer - Link & get the PDF...
Posted by Phillip Torrone |
Jul 12, 2007 06:00 PM
DIY Projects, Electronics |
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TV lift cabinet
Troy writes -
How to build a TV Lift cabinet using an off-the-shelf dresser drawers and an off-the-shelf TV Lift Kit from Firgelli Automations. You could easily spend many thousands of dollars on a custom built cabinet with TV Lift, but for about $500. You could spend more, depending on the ready-to-build furnature you buy, but ours was quite inexpensive.TV Lift Cabinet in under three hours - Link.
Posted by Phillip Torrone |
Jul 12, 2007 04:00 PM
DIY Projects, Electronics, Home Entertainment |
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| Comments (3)
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