New gadget on desktop: Air Quality Sensor

July 25, 2014

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 past year i was working with a material named methyl methacrylate (aka acrylic glass) its strong, transparent and easy to bend. best component to create cases for electronic prototypes. while working, burned a piece from that, applied glue and burned again with solder iron to clean up splinters. probably that's caused a chemical reaction and exthausted a harmful gas. i aware that after 20 seconds but its too late for my lungs.

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 it wasn't a serious damage but i stayed in hospital for one night. after that accident i researched about an air analyzer gadget like r.r.t.s equipment in doom movie. finally discovered MQ gas sensors which manufactured by an east-land company named HANWEI.
 
 purchased MQ5 and MQ9 for testing purposes and found incredibly sensitive which can be used at industrial level. MQ9 sensitive for waste gases like CO/CO2 and MQ5 can detect combustible gases such as propane/butane.
 
 mentioned on previous entries, i already have a talking (in turkish ofcourse smile.gif) digital assistant named judith. she's serving me since 5 years and can provide visual & audible notifications based on internal variables. eg. battery level drops below 50 percent or memory usage higher than 90 percent etc. today i developed another application to gather data from arduino and send to her.
 
 first, tested it with a deodorant which is seen in video. after 36~48 hrs of work, both of sensors become very sensitive even detects human fart (including silent ones biggrin.gif) also product datasheet verifies that by calling it as "internal burn-in time" two week later i discovered a fact, usual raw value of mq9 sensor is around 200~250 but its dropping to 150 at each morning and weekends. streets are empty in these hours, my opinion diesel car exthaust causes carbon contamination in district and it detects them. if this kind of a gadget exists on market, peoples can barely see side effects of liquid fuels.
 
 we're fucking up the planet earth, this is the another fact.


  

Logitech webcam as microscope

July 09, 2014

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 most webcams does not have focus adjustment option. today i tear down a logitech C510 and found one. its already working well on video conversations, also it can be used as microscope by reducing its focus distance.

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 analyzing components of KK board on video, also its very useful on minor self-surgeries.
 now she's retired from skype and started to working as virtual magnifier smile.gif


  

New update: Kantharos IDE v1.2.1

June 15, 2014

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- implemented new exception handler
- updated php installation and manual to v5.5.11
- autocomplete feature implemented based on php5 reference
- fixed minor ui glitches
- UTF-8 file encoding issue solved



  

Strange signals on radio ocean

June 15, 2014

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 2012 was SDR year. some guys (Antti Palosaari and Eric Fry first) discovered possibility of using realtek RTL2832 based devices as generic radio.usually that chips can be found in usb dvb-t sticks which can bought with 10$ from most markets. In same year, i read an article on hackaday and decided to purchase one of them. and did almost all available stunts from positioning ships & airplanes to gathering weather data from satellites in past two years.

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 i was seen strange signals while playing with it, now compiled all of them in this article. my setup is 1x Terratec Cinergy T Stick, 1x indoor tv antenna with built-in amplifier and 1.6ghz netbook which is seen in picture. all signals recorded in same session at 14.06.2014


 Signal #1: 415.6mhz
Its looking like aprs stream, also frequency fits but no any decoders can handle that in my software arsenal.

 

 Signal #2: 448.5mhz
that one is very similar to tty teletype, probably customized and encrypted for military purposes. also local police and fire department still uses old analog walkie-talkie systems in here, conversation stream can be seen in 450~455mhz.

 

 Signal #3: 150.3mhz
I have no idea about that, usually amateur satellites uses that frequency range but my setup cannot catch that signal in this level. it's a mystery.

 

 Signal #4: 152.6mhz
another signal in same frequency range, its like a telemetry data and most interesting one ever seen. due to signal level, probably its coming from a meteorology station where is 6km away from here.


 edit on 30.06.2014: it was a network beacon of new model DMR radio. next week i monitored same channel about 48hrs and got a digital voice stream. decoded it via dsd+ and just hear conversation from new hospital of city. looks like new goverment building uses new tech.

 

 Signal #5: 135~137mhz
yes, most strange part is in here. i was seen that few times but i supposed its a device glitch or software error. then someday tried with different antennas & different angles and i seen signal level was changed. it's obvious to coming from far away and it's not human made. i seen some guy's article which is mentioning about detecting galactic rotation with software defined radio. he was demonstrating similar signal shapes in screenshots. my best guess is that's a frequency reflection from moon or other planet's surface. we're living in a huge signal ocean, that's possible.

 

 playing with sdr is fun but it uses too much system resources, my opinion it cannot be used in business or other proffessional purposes. if interested, you can proceed following links to dive into ham-radio world:

 

 http://sdr.osmocom.org/trac/wiki/rtl-sdr
home of the first apps developed for RTL2832


 http://www.rtl-sdr.com/
a blog about all about things which you can do with RTL2832


 http://hackaday.com/?s=RTL2832
all available articles about 2832 on hackaday


 http://sdrsharp.com/
win32 sdr application which has native RTL2832 support


  

New Release: FTP Live Sync

May 07, 2014

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 Livesync allows us edit server side scripts on the fly by modifying its local
copy. basically it's a ftp client which can monitor changes in filesystem
and upload modified file to remote server.

still in beta but its functional now.



  

Disclosure: Most realistic VR concept ever

April 26, 2014

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 90's was golden years of movie industry. explosions, artist makeups etc. everything was real without retouch of computer. also that timespan was give us inspiration for current year's technology.

 The movie name is Disclosure. i was seen a little cut from it about 15 years ago. somehow i remembered today and tried to find it again but no luck. because it's not a sci-fi movie. (also im not familiar with michael douglas) finally found it by filtering all oldschool artists one by one (richard gere? no m.douglas? maybe)

 im researching oculus enabled applications about few months but there is no valuable entry except few tech demos and games. someone created a vr file browser and published it at reddit. that one is most closest and useful application which matches to this concept. i think that's best way to manage hundreds of file and information like sherlock's mind palace.


  

New Revision: WIADUC

March 22, 2014

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 Due to new local censorship on turkey, i revised the dns manipulator tool called "wiaduc"

 
it can help when you're cannot access to public dns servers such as google (8.8.8.8) or opendns (208.67.222.222) etc.



  

Pain and Suffer inside: Displaylink Adapter

January 31, 2014

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 as mentioned on my recent tweets, was looking for a low cost multi-display solution about couple weeks. gaming oriented gfx cards already providing this feature but they costs as a new computer and requires gigantic power supplies. that will an unnecessary investment.

 
finally i purchased an usb displaylink adapter with a fast decision. i supposed its an gfx chip which can communicates with mainboard via usb port.

 
..But it's not
It creates a virtual desktop on your system by using software and captures realtime video from it. then device receives this video with 50~250ms delay. i don't sure that's applicable in commercial industry but it's terrible idea.

 
Suffer begins
Maybe their certified products working without any trouble but i did my second mistake by purchasing an unknown chinese brand with high price. its getting warm on first usage and resets itself due to overheating. and i decided to use it by replacing heatsinks instead of refund. this time heatsink melts its plastic cover, and i installed a small fan into it. wtf. this is madness.

 
The Cure
ofcourse i didn't use it due to its noise, i researched more and finally found the Sapphire HD6450 Flex edition it uses an unique technology called "Flex" to get three displays same time. that's exactly what i need but its obsolete a little bit and hard to find in local market. then found on someone's ebay store later.

 
after the two weeks, i received item, installed it to my mini-itx case and sent that usb-crap to trash. if you're planning a similar screen setup, stay away from displaylink devices.



  

Fail of week: WS2811 VU-Meter

January 19, 2014

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 after the few commercial projects, i got some "me-time" at last. i sold all of my geek toys and some trash on ebay except few arduino boards and shields. and i tried to make something useful from this spare parts.

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 WS2811 is a digital adressable rgb led controller unit. some eastern tech-manufacturers developed independent color led strips by combining rgb leds and that chip. i purchased half-meter length sample and tried few tests with arduino. looks like working ok but the problem is ATmega8 clock rate too slow for this kind operations. an ARM or FPGA based board required for real light shows.


  

VR Experiences #1: Oculus Rift

November 01, 2013

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 The 80's childs are familiar with virtual reality term. we seen this subject in the action at johnny mnemonic, the lawnmowerman etc.

 
if you're not living in a cave, probably should know the oculus rift. it was a kickstarter campaign about a simple vr helmet (hmd) project and also succeeded. its currently in development stage. price is 300$ but you need at least ~650$ including shipment, customs etc. if you're staying in europe.

 
Today, i experienced it about five minutes in somewhere and decided to write first impressions which memories are still fresh.

 
Pros
- It can provide exact virtual room feeling with built-in gyros. your brain will adopt new visual input source in few seconds.
- Completely plug & play. no detailed configuration needed.
- Image quality not good for still pictures but enough for a fps simulation.
- Good price.

 
Cons
- You can clearly see pixels, that's annoying.
- User only see @ of 21cm (4 inch) screen from 3-4cm distance. rest of screen area wasted.
- built from cheap plastic, not designed for long life usage.
- lenses are easily vaporizing by your own breath and blocking vision after few minutes later.
- I know its development version but still too big for human head..
- All games must render two copies of scene in splitscreen. that means high usage of system resources.
- Causes headache and dizziness in 3d sbs games after 10 minutes of gameplay.
- Material is not hygienic, probably it will cause bacterial infections in long-term use.

 
actually its a stereoscopic viewer with aspheric lenses. all trick turning around splitscreen special games and third party extensions such as tridef. if interested with its technical part, this guy was created a exact clone of oculus and shared details on his blog



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