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Archive: Electronics
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October 26, 2007
Surveyor SRV-1 Blackfin camera board
Chris writes in -
With all the chatter about open hardware lately I wanted to let you know about Surveyor Corporation. They are a very open company and provide Eagle schematics for their products including the soon to be released Blackfin based robotic controller. I hope that more companies continue to operate with an open design friendly business model like Surveyor, Chumby Industries, and the dozens of other open companies out there.Surveyor SRV-1 Blackfin camera board - Link.
Posted by Phillip Torrone |
Oct 26, 2007 06:00 AM
DIY Projects, Electronics, Open source hardware |
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| Comments (0)
DIY third hand - A multi-use helping hand for electronics and other delicate work
Ryan writes -
In the past I've used the third hands/helping hands available at chain electronics shops and have been frustrated with their usability. So I decided to make my own. The best part, aside from the ease of use, is all the attachments you can make for it. It's great for electronics as well as crafts.Third Hand++: A multi-use helping hand for electronics and other delicate work. - The World's Biggest Show & Tell - tech, craft, diy - [via] Link.
Related:
Third hand - Link.
Soldering arms (DIY 3rd hand) - Link.
Improving a 3rd hand - Link.
3 degrees of freedom positioner for soldering / gluing ... - Link.
Posted by Phillip Torrone |
Oct 26, 2007 05:00 AM
DIY Projects, Electronics, Toolbox |
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| Comments (0)
DIY Electric utility vehicle part 2
FrankG's electric utility vehicle part II. He's added a roof, body panels, plexi-glass windscreen, new batteries and a camo paint job as well as installing an "On-Board" 36V/35Amp charger and a simple analog meter array to monitor individual battery voltage - Link.
Related:
Electric utility vehicle part 1 - Link.
Posted by Phillip Torrone |
Oct 26, 2007 04:00 AM
DIY Projects, Electronics, Transportation |
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| Comments (0)
Motors for Arduinos
I asked Todobt for some advice on using motors with Arduninos without a motor shield, his answer was great and makes a good post to share, so here it is... -
For normal motors, just about any surplus DC motor that's rated something like "1.5VDC - 6VDC" will work. Add a transistor like a TIP120 to switch the higher current and a diode across the motor to protect against back EMF and you're done. You can only drive the motor in one direction with that though. To do forward/reverse you need 4 transistors and at that point it's easier to just use the standard motor driver chip. (it's just those four transistors wired up for you in a package)todbot's blog - Link.For servos, I've only really played with the standard $10 hobby servos. I always get the cheapest ones out there. I run the servo control signal directly to an Arduino pin, and power the servo directly from the Arduino power supply. Most servos are made to operate at around 5V, but I think there are others that will take 12V or something.
With the DC motors, I also power them off the Arduino +5V power supply. A motor with a higher voltage rating would be better powered off Arduino Vin. This is where the transistor is neat, because it switches the higher voltage to the motor using the lower voltages of the Arduino. Transistors rock.
One thing to note though is that if you're using a 'minimal' Arduino like a Boarduino, its power supply caps might not be enough to filter out the motor noise and you might get some brownouts. Also, powering motors off of 9V batteries can be hit-or-miss too. I'm still experimenting with a solution for that for the Arduino class I'm teaching in November.
Post up in the comments if you have other suggestions.
Posted by Phillip Torrone |
Oct 26, 2007 03:00 AM
Arduino, DIY Projects, Electronics, Open source hardware |
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| Comments (2)
TV Remote jammer!
Kipkay writes -
I've had a few scuffles in my house over the TV remote so I decided to do something about it. I built a circuit that will block my TV and any device I choose from getting a signal from the normal remote control. I turn an ordinary remote into a jammer and the remote still works normally!TV Remote jammer! - Link.
Posted by Phillip Torrone |
Oct 26, 2007 01:00 AM
DIY Projects, Electronics |
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October 25, 2007
Carl & Jerry: Their Complete Adventures, Volume 4 by John T. Frye
Jeff writes in with a new Carl & Jerry! -
After a lot of delays this summer, I finally got the fourth (of five) volumes of Carl & Jerry stories up on Lulu and ready to sell...I also pinched off the first free story from Volume 4:Carl & Jerry: Their Complete Adventures, Volume 4 by John T. Frye (Book) - Link & sample PDF.The story presents a fascinating concept: An "infrasonic" microphone that works a little like an aneroid barometer, with a flexible brass sheet sealed over the mouth of a glass jar, acting as one plate of a capacitor that varies in response to atmospheric pressure waves of extremely low frequency. Interestingly, the story is one of the few in which it's never resolved whether the gadget really works or not, but it always made me want to build one and try it myself--which, after all, is what the Carl & Jerry stories are supposed to do!
The final Volume 5 should be done by the end of the year. Thanks for putting the stories back in the public eye.
Posted by Phillip Torrone |
Oct 25, 2007 05:00 PM
DIY Projects, Electronics, Retro |
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HOW TO - Make a fridge alert
The latest "Gadget Freak" from Design news is a fridge alert! -
When you've popped in your fridge alarm, getting peckish in the middle of the night and forgetting to close the door -- along with escalating electricity bills -- will be a thing of the past. Italian inventor Flavio Dellepiane has designed a 3V battery-powered fridge alarm that beeps if you leave the door open for more than 20 seconds. When the fridge lamp illuminates, the alarm's photo resistor lowers its resistance, the IC starts counting down and, after a preset delay, the piezoelectric buzzer beeps for 20 seconds.HOW TO - Make a fridge alert - Link.
Posted by Phillip Torrone |
Oct 25, 2007 12:00 PM
DIY Projects, Electronics |
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Microcontroller link for under $20
A follow up from James, he writes in -
Thank you for putting up the link to the PC controller article. I've published part two now, which is to link two microcontrollers with each other using the internet for under $20. It has been a work in progress for the last few months and actually started with a question someone posted on the Make forum where they wanted to control their home thermostat from work.Microcontroller link for under $20 - Link.
Related:
Control real world devices with your PC - Link.
Posted by Phillip Torrone |
Oct 25, 2007 10:00 AM
DIY Projects, Electronics |
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Boarduino, Wii nunchucks and servos
Todbot writes -
The Boarduino's small footprint made me want to see how small of a device I could whip up in an hour from some fairly complex components. So I decided to see how small the combination of a Boarduino, a Wii Nunchuck, and a hobby servo motor could be. Here's a little video of the result.Boarduino, Wii nunchucks and servos - Link.
Related:
Boarduino (Arduino Clone) Kit - Link.
Posted by Phillip Torrone |
Oct 25, 2007 07:00 AM
Arduino, DIY Projects, Electronics, Open source hardware |
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| Comments (2)
ECC802S SRPP / EL84 (6BQ5) Push-Pull tube amplifier
Gio writes -
Bruce's latest project is an EL84 Push-Pull Tube Amplifier. LM317 Regulators are used for constant current sources (CCS) to set the bias of the output stage. It is interesting to see a modern semiconductor combine with vacuum tube technology.ECC802S SRPP / EL84 (6BQ5) Push-Pull Tube Amplifier - Link.
Posted by Phillip Torrone |
Oct 25, 2007 05:00 AM
DIY Projects, Electronics |
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| Comments (1)
Toy Oscilloscope
Rob writes in -
Sometimes the best way to take a step forward is to take a step back in time. So Andrew Smith designed a fully-functional toy oscilloscope, made out of parts he found in his junk box, such as the EF91, EF80 and EF184 valves. Using a DC-DC converter to power the old (but still working) 7cm CRT he discovered in his loft, Andrew housed it in the same wooden box as the rest of the circuitry. The whole system runs from a single regulated 12.6V DC supply, which can be derived from a "wall-wart" PSU. Doc Brown would be proud.Meet Andrew's blast from the past (Gadget Freak) - [via] Link & more.
Posted by Phillip Torrone |
Oct 25, 2007 04:00 AM
DIY Projects, Electronics, Retro |
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October 24, 2007
Infrared remote control receiver for Media Centers
Serasidis writes in -
An RC5 infrared remote control receiver that can be used to handle any function or software installed in your Media Center PC. Further, it can be used to power On/Off your Media Center even it is in Hibernate, stand-by or power-off mode.Infrared remote control receiver for Media Centers - Link.
Posted by Phillip Torrone |
Oct 24, 2007 07:00 PM
DIY Projects, Electronics, Home Entertainment |
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| Comments (3)
"Digg me' T-Shirt using the Digg button kit
Hah! This is awesome, it's a shirt you can "Digg" based on the open source Digg button kit - [via] Link.
Posted by Phillip Torrone |
Oct 24, 2007 05:00 PM
DIY Projects, Electronics, Open source hardware, Wearables |
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| Comments (0)
High power TV-B-Gone kit - turn TVs off from 100 feet away
The MAKE store will be carrying this new open source hardware kit shortly, but if you can't wait you can get it from Adafruit now... -
Tired of all those LCD TVs everywhere? Want a break from advertisements while you're trying to eat? Want to zap screens from across the street?TV-B-Gone Kit [N. America/Asia v1.0] - $19.50 : Adafruit Industries, Unique & fun DIY electronics and kits - Link.The TV-B-Gone kit is what you need! This ultra-high-power, open source kit version of the popular TV-B-Gone is fun to make and even more fun to use. This version is best used in countries with NTSC: North America & Asia.
This kit comes with all parts necessary. Tools and batteries are not included. This is a very simple kit and great for people who have never soldered anything before.
Power: 2 AA batteries (not included)
Output: 2 narrow-beam and 2 wide-beam IR LEDs
Number of TV power codes: 46This covers pretty much every TV of the following brands, including the latest flat-screens and plasma TVs:
Acer, Admiral, Aiko, Alleron, Anam National, AOC, Apex, Baur, Bell&Howell, Brillian, Bush, Candle, Citizen, Contec, Cony, Crown, Curtis Mathes, Daiwoo, Dimensia, Electrograph, Electrohome, Emerson, Fisher, Fujitsu, Funai, Gateway, GE, Goldstar, Grundig, Grunpy, Hisense, Hitachi, Infinity, JBL, JC Penney, JVC, LG, Logik, Loewe, LXI, Majestic, Magnavox, Marantz, Maxent, Memorex, Mitsubishi, MGA, Montgomery Ward, Motorola, MTC, NEC, Neckermann, NetTV, Nikko, NTC, Otto Versand, Palladium, Panasonic, Philco, Philips, Pioneer, Portland, Proscan, Proton, Pulsar, Pye, Quasar, Quelle, Radio Shack, Realistic, RCA, Samsung, Sampo, Sansui, Sanyo, Scott, Sears, SEI, Sharp, Signature, Simpson, Sinudyne, Sonolor, Sony, Soundesign, Sylviana, Tatung, Teknika, Thompson, Toshiba, Universum, Viewsonic, Wards, White Westinghouse, Zenith
Max distance: At least 100 ft!
Posted by Phillip Torrone |
Oct 24, 2007 03:00 PM
DIY Projects, Electronics, Home Entertainment, Open source hardware |
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| Comments (8)
Control real world devices with your PC - microcontroller tutorial
Dr_Acula writes in -
I am a regular contributer to a microcontroller discussion forum and there are lots of school aged kids who need help with various projects. One question that comes up quite regularly is how to interface a PC to a microcontroller via a serial port and then have the PC control things and sense things. The above link walks through the process step by step and assumes no programming eperience with either microcontrollers or a language like VB.Net. It was written targeting school aged kids...Control real world devices with your PC - microcontroller tutorial - Link.
Posted by Phillip Torrone |
Oct 24, 2007 07:00 AM
DIY Projects, Electronics |
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Video courses in electronics
Here's a 5 part video series that teaches some of basics in electronics -
The first lesson is a basic introduction to what we will cover, care for your lab, and explaining the basic chips and what they do. The first 2 lessons get your hands dirty making two simple circuits that make a light blink and a speaker sound like a buzzer using a 555 Texas Interments IC chip. Starting with Lesson 3 we will be going over basic things like switches and how they work. So don't expect to understand anything until lesson 3. Later on I will work on figuring out how to use a rechargeable 9V lithium battery instead. I will also work on a list of parts you can buy to build your own kit if you can't afford one from RadioShack or they stop selling them. Have Fun!A complete course in electronics - Link.
Posted by Phillip Torrone |
Oct 24, 2007 06:00 AM
DIY Projects, Electronics |
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| Comments (0)
Sentry data logger
Adam writes in -
Even though it's R/C specific, this forthcoming device from Novak looks like some of the sensors could be useful for a variety of projects.Sentry data logger - Link.
Posted by Phillip Torrone |
Oct 24, 2007 05:00 AM
DIY Projects, Electronics |
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| Comments (0)
DIY Tengu on a breadboard
Alex writes -
When I first saw Crispin Jones Tengu, I was sure, I must have one. If you don't know tengu and don't want to follow the link, it's a small face, made of LEDs, that reacts to music and sound. It did not take long until I decided to clone this funny little device. All it needs is a microcontroller, an LED matrix and a sound sensor.Tinkerlog » Blog Archive » DIY Tengu on a breadboard - [via] Link.
Related:
Tengu - Link.
Posted by Phillip Torrone |
Oct 24, 2007 12:00 AM
Arduino, DIY Projects, Electronics |
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| Comments (0)
October 21, 2007
Light-up sidewalk brick
This weekend while walking down Mill Avenue in Tempe, AZ, I saw an interesting sight. The sidewalk is made of bricks, but one of them was glowing. Upon closer inspection, it appeared one brick had been removed and replaced with an acrylic box containing a light source, which was backlighting a drawing on the inside of the transparent acrylic. My curiosity got the better of me, and I pried the top off (which was caulked to the bricks around it) with my multi-tool. What I found was pretty neat: a thick top layer of clear acrylic protecting a vellum drawing, lighted with a single 5mm LED hooked up to a battery pack. The initials "BRT" and the date "10/07" were written on the inside of the box. Having opened the box and accidentally torn the drawing, I felt I should add something to indicate I meant well. I happened to have some LEDs and coincell batteries with me, so I taped up an extra light (the one already in the box was not very bright or diffused), and stuck it inside, then pressed the lid back on as securely as I could. I have no idea who made it, but I have a Flickr set - Link.
Posted by Becky Stern |
Oct 21, 2007 12:00 PM
Arts, Electronics |
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| Comments (19)
October 19, 2007
Graphite sequencer
Here's an interesting project by Caleb Coppock:
Graphite conducts electricity. Two wires brush against the surface of a paper disk as it spins. The wires are connected to a simple electronic tone generator. When a line of graphite is drawn across the disk, connecting two wires, a tone is heard. The quality of the line affects the sound. For example, if the line is thick, allowing more current to pass over it, the pitch changes to a lower tone.Graphite sequencer - [via] Link.
Posted by Becky Stern |
Oct 19, 2007 03:00 PM
Arts, Electronics, Music |
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| Comments (0)
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