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Archive: Electronics
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April 13, 2007
RFID Enabling your door with a Parallax BASIC Stamp & 13.5 MHz APSX RW-210)
Nick writes -
I noticed you posted a previous project of mine and I thought you might be interested in my latest update to it. Same idea (RFID enabling your front door), only this time it is done completely standalone using the Parallax Basic Stamp 2e and the 13.5 MHz APSX RW-210 RFID reader. Response time, and reliability are very much improved with the new design.
RFID Enabling Your Front Door (with a Parallax BASIC Stamp & 13.5 MHz APSX RW-210) at Digital DawgPound - Link.
Posted by Phillip Torrone |
Apr 13, 2007 02:00 PM
DIY Projects, Electronics |
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HOW TO - Building a custom Monome controller, with STS9's David Phipps
Peter writes -
Part of the advantage of open hardware is that you can modify products to be whatever you want. David Phipps of the "electronica jam band" Sound Tribe Sector 9 wanted his own Monome controller for manipulating live music mixes with Ableton Live, but he also wanted twice the number of buttons as on the stock model.Result: custom-produced controller, based on the open specs and brain of the open project.
This was a first-time DIY project, so along the way he found lots of tips on where to get parts and how to get cheap custom fabrication of elements like the faceplate.
Create Digital Music » Building a Custom Monome Controller, with STS9's David Phipps - Link.
Related:
- Open-source grid controller - the monome (video) - Link.
- The Open Source Gift Guide: Open source hardware ... - Link.
Posted by Phillip Torrone |
Apr 13, 2007 01:00 PM
DIY Projects, Electronics, Music |
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Guitar Heronoid - Android plays Guitar Hero
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Goodness, this is awesome -
An android that plays the Guitar Hero game. A computer processes the video feed from the PlayStation2, detects where, when and how to play and moves the fingers accordingly. This project was done by GarageGeeks members Rafael Mizrahi and Tal Chalozin.
Guitar Heronoid - Link & photos.
Posted by Phillip Torrone |
Apr 13, 2007 11:00 AM
DIY Projects, Electronics, Music, Robotics |
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EID electronic kits
EID has a ton of fun kits to check out (many of them super simple and great for learning). The temperature and USB kits look really interesting - Link.
Related:
Posted by Phillip Torrone |
Apr 13, 2007 07:00 AM
DIY Projects, Electronics, Kits |
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'lectronics in a bottle
Here's an Atari Punk Console build inside a light bulb - glasware-electronics "ships in bottle"-style, Thanks Koelse! Link.
Posted by Phillip Torrone |
Apr 13, 2007 06:15 AM
DIY Projects, Electronics |
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PICAXE PICAXE PICAXE
Rick writes -
All you wanted to know about using, interfacing and programming a PIC microprocessor system. The UK equivalent to STAMP but a lot cheaper. Many projects available and a new faster expanded range of processors out in May 07.PICAXE - Link.
Related:
- Picaxe Metronome - Link.
- Picaxe Microprocessors - Link.
- MedCosm Picaxe blending light - Link.
- HOW TO - PICAXE your iDog - Link.
- TV Remote control decoder kit - Link.
- DIY laptop - Link.
Posted by Phillip Torrone |
Apr 13, 2007 03:08 AM
DIY Projects, Electronics, Robotics |
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| Comments (4)
April 12, 2007
Voltoids: HOW TO - Make 5V from 1.5V
Nice project from the PopSci folks on instructables -- how to take 1.5V to 5v, and of course jam it in an Altoids tin.
Yes, you read that project title right; this simple circuit will enable you to generate 5V DC from a single 1.5V DC AA battery. How can you pump 1.5V up to 5V, you ask? It's simple with a little piece of electronic steroids from MAXIM IC.The MAX1674 IC is a DC-to-DC step-up converter that can take in voltages as low as .7V and crank out a digital circuit enriching 5V. Or, for more finicky projects, the MAX1674 can also output 3.3V. A simple pin-selectable preset determines the output voltage.
There is one small caveat with this project, however. Whether a blessing or a curse, the MAX1674 generates a steady-state output current ranging between 180-420 mA. Therefore, high current projects involving motors won't be able to benefit from this voltage amplifying circuit.
On the other hand, powering lightweight projects involving TTL/LS circuitry or LEDs are ideal applications for Voltoids. In fact, with such a low operating current, the MAX1674 is able to drive a 3.3V LED without the ubiquitous power-limiting resistor. All from a single 1.5V AA battery.
If this project seems beyond your talents, but the benefits of powering a digital circuit from a single 1.5V DC power source sounds enticing, you can opt to purchase a similar circuit from Spark Fun Electronics. Costing less than $10, this clever little device which is designed by Bodhilabs.com is housed discretely on the back of an AA battery holder.
Unfortunately, with this commercial product you are limited to a fixed 5V output and it isn't housed in a cool Altoids tin. Enter Voltoids.
instructables : Weekly Project: Voltoids; or, How to Make 5V from 1.5V - Link.
Posted by Phillip Torrone |
Apr 12, 2007 10:00 AM
Altoids and tin cases, DIY Projects, Electronics |
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AVR Television (second episode)
The second episode of AVR television is out! That's right, an entire "TV" series devoted to a microcontroller, it doesn't get more exciting than this - well, for us...
In this second issue of AVR TV, we present the new AVR32 microcontroller: the UC3. We take a brief look at the features of this new product, some performance numbers, the toolchain and its right place in the AVR portfolio. And our special guest describes the new evaluation kit, the EVK1100, in affectionate terms.AVR Television » - Link.
Related:
- AVR controlled clock - Link.
- Lemon-Powered AVR Tiny - Link.
- AVR LED Clock - Link.
- AVR ISP programmer in a mint tin... - Link.
- ELM - AVR based radio spectrum monitor - Link.
- Getting started with 8 bit AVR microcontrollers - Link.
- Getting started with AVR microprocessors on the cheap - Link.
- AVR TV Video Podcast from Atmel - Link.
- More AVR! - Link.
From the Maker store:
The MiniPOV is an AVR based project, a third generation of original MiniPOV, upgraded to make it easier for people to build: no microcontroller-programming device is needed (but encouraged!) and the source code is in C not assembly. It includes high quality PCBs and LEDs. The kits is designed as an ideal starting place for anyone who wants to: learn how to solder; learn how to assemble simple kits; learn how to program microcontrollers; and make blinky stuff - Link & get it at the Maker store.
Posted by Phillip Torrone |
Apr 12, 2007 08:00 AM
DIY Projects, Electronics |
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| Comments (1)
Get 2 microcontroller dev boards for the price of one
Ladyada writes -
Looks like Atmel is doing a promotion. I paid $79 for my STK500. Now you'd get 2 top-of-the-line microcontroller dev boards for less than the price of one. Super useful for those strange times when you need to do some HV programming or want to prototype something fast!AVRDEVKIT1-ND from DigiKey, its not in stock right now but looks like you can backorder it and it'll ship in a few days.
Atmel dev board promotion - [via] Link.
Posted by Phillip Torrone |
Apr 12, 2007 06:00 AM
DIY Projects, Electronics |
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| Comments (1)
Synchronizing fireflies
Alex writes in with some Synchronizing fireflies (LEDs) -
This is a simulation of fireflies. Each firefly is represented by a tiny microcontroller, an LED and an LDR. After some time of flashing chaotic they synchronize and flash all at the same time.instructables : Synchronizing Fireflies - Link.
Posted by Phillip Torrone |
Apr 12, 2007 12:36 AM
DIY Projects, Electronics |
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| Comments (1)
April 11, 2007
MAKE: Cellular automata video synthesizer kit & Videothing CONTEST!
We had nothing to do with this contest, but we love it! Videothing is having a contest for folks who have/build the new Cellular automata video synthesizer kit!
We're so excited about the new video cellular automata kit from MAKE magazine, that we're going to hold a contest to see who can make the coolest implementation of it- bend, hack, unexpected use or just a sweet case design, the sky is the limit.. Get the kit here and send your entries (pics, video, descriptions!) to wiley at mediatronica dot com. *
The winner will be chosen by a panel of Video Thing participants and the prize is your choice of a neuros mp4 recorder or an elgato eyetv hybrid! The deadline for submissions is July 1st of this year.
Video Thing: MAKE: Cellular automata video synthesizer kit & Videothing CONTEST! - Link.
Related:
- Cellular automata video synthesizer kit (store) - Link.
- Cellular automata video synthesizer kit (info) - Link.
Posted by Phillip Torrone |
Apr 11, 2007 04:26 PM
Announcements, Electronics |
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| Comments (1)
HOW TO - Make a skin temperature transmitting device
Jan Cocatre-Zilgien shows you how to make a skin temperature transmitting device in the latest Citizen Scientist -
Any parent who has had to take care of a feverish child at home knows what a source of emotional stress and anguish it can be. This is magnified at night, as fever often tends to get higher then. Unchecked fever may create complications of its own, such as dehydration and febrile convulsions in infants. The lack of sleep resulting from periodically monitoring the child can be very tiring for the parents, especially if the fever spans several days.When small single-chip transmitter and receiver modules became publicly available, it was an invitation to design a skin temperature telemetry system for those parents. I used the very robust modules from Linx Technologies, with 418 MHz chosen over 315 MHz because of the slightly shorter antenna. Essentially, if the transmitted child skin temperature gets too hot (fever peak) or too low (malfunction), an alarm is triggered at the receiver. The version whose receiver is integrated with an alarm clock was patented in the USA under patent number 5,844,862, which shows variants and other complementary information. Figure 1 is a sketch of the completed device.
The Citizen Scientist - Link.
Posted by Phillip Torrone |
Apr 11, 2007 12:18 PM
DIY Projects, Electronics |
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| Comments (1)
SEGA video synth
Gijs writes in -
Here's a sega megadrive/genesis sequencer that controls the joystick and bends.. It syncs to the gameboy so the characters in the game move to the music that is comming out of the gameboy..the game that has been used in the video rom on my site was hacked. sonic and tales was completely re-worked, the layout is different and you can see the flowers have turned into gameboys...
GIESKES.NL/VISUAL-EQUIPMENT/SEGA_SEQ_1 - Link.
Posted by Phillip Torrone |
Apr 11, 2007 11:13 AM
Electronics, Made On Earth |
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Plasma ball nixie tube
Daqq made a plasma ball made out of an old nixie tube - Link.
Basically, a plasma ball or lamp or however we decide to call it is a glass sphere/other shape filled with very low presure gas (ussually neon) and a tesla coil (or any similar resonator based power supply) or other high voltage power supply with AC high frequency output. In theory it is very easy to make one, if you have access to low presure neon pumping facilities, custom made glass and a tesla coil. ;-) The scientifically more correct explanation of how the plasma ball works can be found here. The father of the whole plasma ball is Nikola Tesla. So treat it with respect.Now. To avoid buying thousands worth of gas pumping equipment and a glass manufacturer I decided to look for alternative sources of low presure gas filled glass items. And guess what! A nixie tube! The basic principle of the nixie tube is an inert gas discharge, where the gas becomes conductive at low presures and high voltages and even glows! That's why nixies work and have that beautiful warm glow surrounding them.
A close look at the contruction of a nixie shows that it's full of metal, which is conductive and connected outside.
Related:
- Nixie tube take-apart - Link.
- Nixie Tube collectors and designers - Link.
- Maker of the day - David Forbes, Nixie-display clocks ... - Link.
- The most accurate nixie clock - ATOMIC! - Link.
- More nixie! - Link.
Posted by Phillip Torrone |
Apr 11, 2007 08:10 AM
DIY Projects, Electronics |
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| Comments (0)
COM84 serial programmer
Ben sent in this COM84 PC board, a simple serial port, PIC based programmer - Link.
Related:
- PIC microcontrollers - a beginner's guide - Link.
- Get your PIC on - free PIC programming resources - Link.
- Programming PIC microcontrollers in BASIC - Link.
- USB/Serial PIC programmer - Link.
Posted by Phillip Torrone |
Apr 11, 2007 06:08 AM
DIY Projects, Electronics |
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| Comments (1)
Electronic game kit
We've added another one of our kits to our MAKE instructables group - Originally designed for the Maker Faire by Grand Idea Studio, the "Build Your Own Electronic Game Kit" is a custom-created kit intended to introduce you to the world of electronics and soldering. When successfully assembled, the kit becomes a version of the popular memory game, Simon, with a few optional twists. It's available on the MAKE store.
This kit is extremely simple to construct even for beginners! If you need something to practice your soldering on (and get a cool result), get this. To learn the basics of soldering check out this great guide by noahw. Also, here's a good video tutorial here.
Instructions are conveniently printed on the back of the unit, and most components don't need to go in in specific orientation. (Only the LEDs and IC -- so watch out for those steps). Also there are a couple of modes you can select depending on how you turn the game on - Link.
Posted by Phillip Torrone |
Apr 11, 2007 04:04 AM
DIY Projects, Electronics, Gaming, Toys and Games |
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| Comments (0)
April 10, 2007
Driving high-power loads with a microprocessor
Many of the microcontroller projects here on MAKE control small things like LEDs, but what about large motors? Roger writes -
This tutorial offers suggestions about controlling large loads with a microprocessor. This is often an issue with those building robots who need to control devices such as lights, motors, vacuums, and other accessories found on robots. We will only deal here with devices that need to be switched ON and OFF - not devices that need the power reversed. Obviously drive motors and other devices need to be switched ON/OFF and also have the power reversed in order to reverse the direction of the motors. That normally requires an H-bridge which is a much more complicated circuit.
Driving high-power loads with a microprocessor - Link.
Posted by Phillip Torrone |
Apr 10, 2007 10:02 PM
DIY Projects, Electronics |
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| Comments (1)
DIY Seismic detector
Design news latest "Gadget Freak" has a great how-to on making your own seismic detector -
Like Jack Godell's coffee in "The China Syndrome," the fluid in William Grill's Seismic Detector reveals subtle vibrations. The entire detector is built around a laser pointer, a few hobby-type mirrors, a PIN photdiode, regulator and amplifier, enclosed in common PVC tubing and fittings. This simple and inexpensive combination makes this detector far more sensitive than Jack's coffee.
Case #100: William Noticed a Vibration - 4/9/2007 - Design News - Link.
Posted by Phillip Torrone |
Apr 10, 2007 02:00 PM
DIY Projects, Electronics |
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| Comments (0)
HOW TO - Make the simplest intercom
LeorickSimon writes in -
Using your old phones, you could create personal "micro" telephone exchange as simple as above circuit. I manage to solder the test circuit less than a minute. Than connect the phone and test it. It works. So why 39 ohm? From Epanorama Dot Net, the correct value of the resistor should be a resistor that can limit the circuit current around 30mA total loop. The method is by replacing the resistor in the circuit with a variable resistor, plug in the phones, apply power and tune the current with the variable resistor so the current flow is 30mA. After that take out the variable resistor and measure the resistance/ohm across it. Find the fixed resistor with the nearest ohm reading to it and replace it to the circuit.My Electronics Hobby: Simplest Intercom - Link.
Related:
- HOW TO - Use old telephones as an intercom - Link.
- Homemade Intercom System - Link.
- Build your own intercom or walkie talkie out of two ... - Link.
Posted by Phillip Torrone |
Apr 10, 2007 12:00 PM
DIY Projects, Electronics, Telecommunications |
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| Comments (4)
Oscilloscope clock
Frank made the coolest clock, ever. He writes -
A while ago, while surfing the web I found an interesting idea for an oscilloscope clock. I have spend some time thinking about it first, and finally decided to make one myself. First I made a crappy version with a R2R resistor ladder network for a DAC to test the idea. The next improvement was to use a real DAC that works a lot better. The results were so good that I decided to make this project available as a kit.The idea is to display a working clock on the surface of a CRT tube as used in most oscilloscopes. It's not easy to find large numbers of identical CRT tubes, so I only made a kit that provides the x-y signals. You can connect this kit to any oscilloscope that supports x-y display. Practically any two-channel oscilloscope can handle that. There is no need for Z-modulation (intensity of the beam) as the trace moves very fast between the various parts of the picture. Credits go to the fast settling dual DAC, the most expensive part of the design. The image is very crisp, but remember to put the input channels in DC mode for the best result.
Oscilloscope clock (schematics on the site) - Link.
Oscilloscope Oscilloscope Oscilloscopes!:
- Vector-based Pong on an Oscilloscope - Link.
- Oscilloscope alarm clock project... - Link.
- PIC Based Oscilloscope with LCD - Link.
- Low cost oscilloscope - Link.
- HOW TO - Using an oscilloscope - Link.
- Using an Oscilloscope - Link.
- HOW TO - Making a hard drive laser oscilloscope - Link.
- Single-digit Nixie, Oscilloscope CRT a Weston ... - Link.
- ScopeOnPC - Turn your PC into a an oscilloscope - Link.
- What's the cheapest way to get an oscilloscope? - Link.
Posted by Phillip Torrone |
Apr 10, 2007 08:00 AM
Electronics |
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| Comments (1)
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