Hacked Gadgets Forum

February 28, 2006

Cathode Ray Tube Clock

at 10:33 am. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks
David Forbes has built a very interesting CRT (cathode ray tube) clock. It uses a 3 inch oscilloscope tube. The clock draws images by bending the CRT beam; this produces a smooth well formed numbers. This is a much different procedure than a TV uses to produce images on a CRT. At the time of writing David does not have any clocks to sell but he does intend to have some available in the future.
“The PC board holds a switching power supply, a crystal-controlled microcontroller for generating the timing and scanning the digits, and an analog circle generator system to draw the digits. It makes circles directly from sine and cosine waves. That’s why the curves look so clean. The drawing of the digits is done in segments, each segment being composed of an arc, circle or line. Angled lines are made by putting the same cosine wave onto both the X and Y deflection plates. The display repetition rate is synchronized to the power line frequency by the microprocessor to prevent image ‘swimming’ in the presence of strong AC fields. This allows the CRT to be free of magnetic shielding, which would add to the cost and detract from the beauty of the clock.”

February 27, 2006

Hacking the Devantech SFR04 Ultrasonic Range Finder

at 8:12 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks

Bert van Dam wanted to alter the default operation of his SRF04 Range Finder. Some Lego, a bit of JAL microcontroller programming and a VB computer program has made an interesting project. Bert has made a number of other interesting projects, have a look.

“The Devantech SFR04 Ultrasonic Range Finder indicates the distance to the closest object within range. Echo’s that arrive later are received and processed, but subsequently ignored. For a true radar all signals should be taken into account. So, time to heat up the old soldering iron and make some modifications to the Devantech SFR04 circuit board. We will add a wire to the ‘raw signal line’ and process the incoming data ourselves. ”

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February 25, 2006

Robosapien V2 LED Vision Mod

at 6:47 pm. Filed under DIY Hacks, Electronic Hacks, Toy Hacks

Here is a neat mod by Evosapien to make your Robosapien V2 have better vision in low light conditions. Not to mention it looks very cool. You might remember Evosapien from a previous article. Chances are you have all of the required items, if not everything is relatively inexpensive.

Here is the entire parts list required:
* CD-ROM Audio Cable
* white color LED
* cable housing/shield
* set of small screwdrivers
* solder iron & solder (optional)
* roll of thick double sided tape

Sixteen steps later you will have an enhanced vision system!

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February 21, 2006

Make your own Video Game System

at 10:10 am. Filed under Complex Hacks, Electronic Hacks, Game Hacks


John Beeckler was not content with playing the standard video game systems. The picture shown is of his version one Alien Slaughter System which used three separate PIC chips. John is now working on version two of Alien Slaughter, the new system is being designed around a LEON2 Processor, this is a 32-bit processor using the SPARC architecture.

This is what he said about the version one “After completing the hardware and the video signal generating program for the video controller, it was time to create a some basic low-level functions, which could take care of interacting directly with the hardware. Two examples of such low-level routines are those for drawing a pixel, and for reading the game controllers. The higher level graphics functions, such as those dealing with pixel maps, rotations, and other things are all implemented using these routines, or similar ones.”

February 19, 2006

NES Alarm Clock

at 10:22 pm. Filed under Digg, DIY Hacks, Electronic Hacks

Aaron Mavrinac has mad skills when it comes to soldering.

“So I built a funky alarm clock out of an old Nintendo console. Why? Because I was at Value Village with my girlfriend and my sister, and while they were browsing through miles of clothing the only thing of interest I could find were two broken Nintendo units without paddles, and I had to do something with them.”

read more | digg story

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February 15, 2006

CD-ROM Radio

at 12:11 am. Filed under Cool Gadgets, Electronic Hacks

Need a radio? Why not build your own! The materials that are needed are probably in your house already. H. P. Friedrichs has an interesting design available on his Web site.

“If you’ve studied the subject of crystal radio for any length of time, you’re already aware that these instruments appear in an endless variety. The diversity found in vintage commercial sets is intriguing enough, though I have a special appreciation for homebrew sets and the unusual materials that one tends to find in their construction.

I submit that there is no better place to rummage for radio materials than the nearest waste can. If you’ve got the right eye, there’s always something that can be pressed into service as part of your next project. Empty toilet paper tubes and the venerable Quaker Oats (TM) box are timeless examples of ingenious recycling. I, myself, have built radio components from shoe polish tins, cigarette lighter parts, bits of scrap metal, transformer windings, and similar junk. In this article, I’d like to describe the construction of a set based on some contemporary refuse that you may not have considered.”

February 14, 2006

LED Throwies

at 11:52 pm. Filed under Cool Gadgets, Digg, Electronic Hacks


Looking for an interesting LED project? Why not make an LED Throwie… LED Throwies are an inexpensive way to add color to any ferromagnetic surface in your neighborhood. An LED, a battery, some tape, a magnet and lots of fun! Total cost would be under a dollar each and they seem to gaining popularity.

Check out this cool video of them in action!

read more | digg story

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