Hacked Gadgets Forum

March 26, 2008

Bicycle Rim Antenna

at 5:20 am. Filed under Electronic Hacks, What Were They Thinking


There are all kinds of antenna designs floating around the net and many of them use found parts for their construction. I have never seen a Bicycle Rim Antenna before though! Alan Yates is the creative designer of this antenna.

"Several months ago I was walking home from the post office, nearing my place I saw it was "clean-up week", the curb dotted with various piles of junk people had put out to be disposed off by the council pickup. The pile outside my block of units had mostly busted furniture, but one item caught my eye, an Aluminium bicycle rim. I dug it out and took a closer look. The spokes and hub were all rust-pitted chromed steel, and physically it was for a child’s bike, only around 580 mm in diameter, but the Aluminium itself looked to be in good shape. Antenna was the immediate thought, so I carried it back to the shack.

The spokes and hub where removed and discarded. The rim had a join where steel pegs had been inserted into cylindrical openings in the extrusion and epoxy used to close and secure the join, forming the round shape. I used a cut-off wheel on the rotary tool to cut through the join, breaking the rim so I might measure and feed it."


March 25, 2008

Plasma Tweeter – Audio with no Speaker

at 5:31 am. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks, Insane Equipment


Martin Grebe tipped us about this cool plasma tweeter in the comment section of this article. Timetec did a fantastic job on building this unit! His musical selection isn’t my favorite but the great operation sure makes up for that.

"Now built the completed circuit on a single PCB. Made vertical electrode setup from tungsten carbide (bottom) + stainless steel (top). Reflector made from PVC pipe with rear mirror, which can be backlit with RGB LED’s. 1/2" gap at base to aid upward convection / cooling and improve flame stability. EHT now slightly lower and the gap size has been reduced."


March 24, 2008

New Segway

at 5:52 am. Filed under Funny Hacks


Here is a Segway with tires that are two feet wide! Cool hack that is sure to turn heads, but I still have a thing for the Segway Centaur (video below).


March 23, 2008

PicOx – Open Source Motor Controller for Electric Bike

at 11:57 am. Filed under Complex Hacks, Electronic Hacks

 Have a look at the construction details of this Open Source Electric Bike Motor Controller. There are good circuit construction details and diagrams on the creators site.

More details are available on these pages:


"In brief the PicOx is a PicAxe 08M based digital Controller that performs an ADC of a Hall-effect throttle and an ADC of a Hall-based current sensor. These two parameters determine the “Mark” value of a 15Khz PWM signal that does the switching to the Output stage. At the end of the project the Controller can sustain 48V @ 75 Amps repeatedly for approx 5  second bursts and is really only limited by the In-Line breaker that cuts the supply voltage, though the entire system’s overall design objective is met reliably at 48V 50Amp operation…"

Thanks Frank.


March 22, 2008

Ball Throwing Machine that a Dog can load

at 5:39 am. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks, Funny Hacks


If you have a dog this Ball Throwing Machine could provide hours of fun for him when you are out. It looks overkill for what is needed (just the way we like it).

"I built the ball machine because I thought my dog Jerry, might like it and that it would be something fun for me to build. So after two years of on and off work, with many safety features such as IR proximity sensors to protect Jerry and my son from the machine, I finally complete. "

Via: Zedomax

Name the Thing Contest – 43

at 1:02 am. Filed under Contests


Congratulations to the last contest winner.
The prize this week will help you use your computer and look stylish while you are doing it. (It’s a finger mouse)
This contest will run for one week (March 22 – 28, 2008) . Ending time is based on central standard time. To enter, identify the item pictured above and give an example of what can be done with it. Please do not give the answer in the comments.


Send an email to contest @ hackedgadgets.com with "Name the Thing Contest" as the subject, and the message body consisting of:

  • The name of the item in the above picture
  • An example of what the item pictured above can be used for

The winner will be chosen at random from all of the correct entries.


Added March 28 2008 

The item to guess was a hydraulically powered wheel motor

The winner is Erik van G.

Thanks to all who entered.


Below is a picture of the prize.



March 21, 2008

Custom Made Steel Pencil

at 5:08 am. Filed under Insane Equipment

If you are looking for a special steel pencil don’t bother looking for it at your local department store. For something this unique it needs to be custom made! This one for example was made by Nonentity from a piece of solid steel that was removed from an old copy machine.

"I decided that my rotring 600 series drawing pencil was getting too scarce to replace if I lost it, since they don’t make them anymore, and I wanted to make sure I had a replacement that was the same weight, if not heavier, which this is."

Via: Hacked Gadgets Forum


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