Hacked Gadgets Forum

November 27, 2012

Maker Faire NYC 2012

at 10:04 pm. Filed under Insane Equipment

 

Sean wrote:

Hi all,
I went to Maker Faire in NYC last month and put together a video of the people I met (including Kelvin Doe, who is at the end of the video). There’s some pretty amazing stuff, though it is mostly overview and not so much a step-by-step guide
on how to create specific devices.  Anyway, I hope you check it out, and I hope you like it!

Sean


November 22, 2012

15-Year-Old Kelvin Doe from Sierra Leone visits MIT

at 2:48 am. Filed under Electronic Hacks, Insane Equipment

 

 

Kelvin Doe who is also known as DJ Focus is a 15-Year-Old living in Sierra Leone. His community is not developed, for example the power only works one day a week.  He has built an ton of electronic projects, the incredible thing is that since there is no Radio Shack handy he has to find his parts in trash cans. He also takes things apart to see how they tick. Watch the video below to see how he reverse engineered a battery so he could make his own.  Thanks to David Sengeh for inspiring people like Kelvin and giving him a helping hand. I hope MIT is able to provide his a free education since he certainly deserves it. 

Crowdrise is a non-profit that is accepting donations to solve the problems of Sierra Leone by cultivating innovation among young people.

Thanks for sending this in Harrison

 

 


November 20, 2012

Analog Clock Voltmeter

at 5:43 am. Filed under Complex Hacks, Cool Gadgets, Crazy Hacks, DIY Hacks, Electronic Hacks, Funny Hacks, Insane Equipment, What Were They Thinking

 

What is the voltage on a AA battery? It would be around 1:30PM if you were using this voltmeter! A PICAXE 18M2 microcontroller is used to read an analog value, calculate what time it represents and then uses a stepper motor to spin the adjustment knob to have the clock show the voltage using the hour and minute hands. :)

Read more about the Analog Clock Voltmeter

“The max input voltage for the ADC on the PICAXE 18M2 is about 5VDC.  To tame the input signal for the PICAXE a simple 3:1 voltage divider (10K, 10K, 10K) was implemented.  This limited the input voltage into the PICAXE to 4VDC.  A trim pot was also used to adjust for the input impedance of the PICAXE and to help calibrate the measurement results.”

 


October 31, 2012

50,000 Amp Transformer Short Circuit Test

at 1:04 am. Filed under Insane Equipment, What Were They Thinking

 

If you are thinking that this transformer is quite beefy you would be right. Youtube user Photonvids has designed it to be connected to 220V and it has an open circuit secondary voltage of around 4 volts. This means you can safely touch it with your fingers but I would step back if someone was planning to short it out with a crowbar. I guess that might be a good idea if there was no light in the room and you needed the cherry glow of some hot metal to see with. Next upgrade is the copper buss bar since it gets warm during the testing. In some parts of the country they do drug grow house busts based on the large amount of power the grow lights consume, I wonder what the bust team would say if they broke down the door here? No drugs, just the power supply for a time machine…

September 22, 2012

Pulse Jet Kettle

at 8:05 pm. Filed under Complex Hacks, Cool Gadgets, DIY Hacks, Funny Hacks, Insane Equipment

 

We have seen some pulse jet builds before but this Pulse Jet Kettle has to be once of the funniest builds I have ever seen. You can see the kettle in operation at the 3:20 mark of the first video. It has an added bonus of waking up everyone in the house to get ready to have a cup of tea. 

Via: Hackaday

 

 

 

 


August 27, 2012

Nøkken 3 ROV – Underwater Exploration Vehicle

at 2:13 pm. Filed under Complex Hacks, Crazy Hacks, Electronic Hacks, Insane Equipment

 

I enjoy fishing and try to get out at least 2 or 3 times a year. Sometimes the fish are biting like crazy but other times they are just not very active. I think with a Underwater Exploration Vehicle like the Nøkken 3 ROV the fishing experience would be totally changed. I can imagine scouting the bottom of the river looking for the best spot and it would be great to hanging out watching your hook and seeing the fish swimming around it reacting to your jigging.  Eirik Taylor has built many of these ROVs and this time around he decided to solve the large power cable issue. Since he needs a significant amount of 12 volt DC power on the ROV the DC power tether cable needed to be substantial. What he has done is use the unused CAT5 wires to send down 130V DC. These days POE is quite popular but that typical max voltage is around 57 volts. Looks like typical CAT5 cable is rated at 300 volts so as long as you don’t do the tong test on any of the live wires you should be fine. :)

 

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. “

 

 

 

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