Hacked Gadgets Forum

August 20, 2012

Cheap Tricopter Build and Stunt Demonstration

at 10:42 pm. Filed under Complex Hacks, Cool Gadgets, DIY Hacks, Electronic Hacks, Toy Hacks

 

Hallstudio has been flying RC planes since 1989, lots of things have changed since then. Check out this great Cheap Tricopter Build that he put together. It comprises of a bunch of inexpensive parts that total around $100 but give you the a great tricopter base that you can fly and modify. There are lots of interesting tricks that he demonstrates in the video such as the use of a drywall screw as a simply pivot point which allows a cheap $5 servo to move the tail rotor. If you want to build it he has provided a full list of all the parts needed in the comments of this video. Once you have the tricopter built you don’t want to be knocking into yourself or other things while you fly the thing. Check out the video below where Hallstudio demonstrates a simply but effective carbon fiber beach ball like cage that allows you to bump into things from all angles with no issues. I guess things like the AR Drone has similar crash resistant properties but there is something very cool seeing the flying sphere.

 


August 18, 2012

MSP430 Launchpad controlling Window Blinds

at 9:05 pm. Filed under Cool Gadgets, Electronic Hacks

 

Rambo build a great way to automatically control his window blinds using a MSP430 Launchpad. It doesn’t do much more than just spin the rod in one direction or the other fully when the buttons are pressed but that is just the beginning. It would now be trivial to add things like light sensors that allow the blinds to close when the light level is too high or open when it is getting dark in the room and it is still bright outside.


August 17, 2012

3D Printer built using a SCARA Arm

at 1:36 pm. Filed under Complex Hacks, DIY Hacks, Electronic Hacks

 

If you have a spare SCARA Arm kicking around and need a new project this 3D Printer built using a SCARA Arm might spark some inspiration.

Via: Make

“This project documents the re-purposing of a ‘rescued’ 1980’s IBM 7575 SCARA Robot Arm, into a functional 3D ABS printer. The project features some motor upgrades,  documentation of encoder positioned motor control feedback theory,  the interminglings of EMC2, heated workspace construction and a step by step overview of transitioning from 3D stl model to 3D g-coded structure.  The huge reach of the 7575, allows for printing large objects, (roughly ~25″x12″x6.5″ maximum).”

 

 

 


August 15, 2012

Cardboard Bike in Stores Soon

at 12:51 pm. Filed under Crazy Hacks

 

Inventor Izhar Gafni made a Cardboard Bike which is slated for mass production. The cost to produce one of these bikes is around $9 since the materials being used are inexpensive, the selling price is expected to start at $60. I was surprised to read that the weight that the bike can handle is 485 pounds, I am thinking that this is greater than the typical off the shelf bike in a department store. The inspiration for the bike is a cardboard canoe, who knew there were so many things being made from cardboard!

 

August 13, 2012

North Street Labs Light Show Project

at 11:36 pm. Filed under Cool Gadgets, Electronic Hacks, Insane Equipment

 

 

North Street Labs built a cool looking light show project for the Hippodrome. It is made using a large number of smart RGB LED strips. The effect sure adds a huge amount of ambiance to the party! I can see this system becoming a system that bars and clubs would want to order as a permanent installation. Read the article for lots of tips on purchasing electronic parts in medium quantities.

“An Arduino MEGA 2560 serves as the brain of the system controlling what each light box does, it is connected to several SparkFun EL Escundo Dos boards, an MSGEQ7 7-band equalizer, an adjustable electret microphone, an RS485 differential transceiver, and a 240w 12v power supply that wasn’t nearly as bad as those pesky 5v 5a ones. “

 

 

 


August 12, 2012

RGB Arduino LED Clock

at 2:32 am. Filed under Complex Hacks, DIY Hacks, Electronic Hacks

 

Got an Arduino and looking for a cool project? Have a look at this RGB Arduino LED Clock over at ElectronicProjects.blogspot.ie. It has some cool specs and looks great!

“180 RGB LEDs driven by TLC5925 constant current LED drivers
each LED addressed separately (12x TLC5925 with 16 outputs each).
each colour adressed individually
4x 7 segment LED display
Atmega328P as MCU
DS1307 real time clock
Photoresistor (for adjusting brightness)
And DHT11 for temperature and humidity
Backup battery for clock
5V DC (eg USB)”

 

August 9, 2012

Fixing Corsair SP2200 Crackling Speakers

at 10:57 pm. Filed under Electronic Hacks

 

Michael Chen from Panama wrote in about his troubleshooting and repair of his Corsair SP2200 Crackling Speakers. He has also entered this into the Instructable’s fix and improve contest so if you like it please vote for him.

“Here is how I fixed a crackling SP2200 speaker

However, the most interesting thing is how I troubleshooted the problem, which does not appear there since it is aimed to a different audience.

I first thought it was a faulty potentiometer, as I’ve had them fail like this before. After disassembly, I noticed they were ok, so I then checked for cold solders. Again, this was not the problem.

The moment of inspiration came when I found out that the headphone output on the speaker also exhibited this crackling. I started to reverse engineer the board and found out that after the audio input, it went through several rcl filters, the volume pot, and finally, the headphone amplifier (which is just a pair of op-amps). The crackling was being introduced further down the line and traveled back through the relatively high impedance line, this noise probably caused by the class D amp housed in the subwoofer.

I also found out that the impedance was very high after the filters due to high in series resistance.

The fix would be to add a buffer after the potentiometer so that the whole system was more tolerant to noise. The two op amps from the headphone amplifier seemed like an ideal candidate. A few jumpers later, the speaker was working perfectly, although the op-amp’s gain could do some adjustment to return volume control back to normal levels. Meanwhile, I just lower the volume on software.”

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