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Konstantin Gredeskoul
Worked at Wanelo, Inc.
Attended Kharkiv State University, Kharkiv, Ukraine
Lives in San Francisco, CA
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Konstantin Gredeskoul

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Quick question: I was dumb enough to accidentaly plug in 12V power into SmartMatrix + Teensy.  The Teensy board is fried, and it looks like even with another Teensy board the matrix is not working.  I am attaching a video of what it looks like with a fresh/new Teensy board, flushed with the latest trunk of Aurora code, and connected to 5V.

Any pointers?  Is this the matrix itself?  Is it the SmartMatrix board? Something else?

I am using external power adapter, and not the USB.
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Pixelmatix's profile photoKonstantin Gredeskoul's profile photo
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Yes indeed, it was the panel itself. Newly replaced one works like a charm.
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Another finished project: bed side clock with neo pixels, light sensor, and seven segment LED screen from Adafruit. It's running on Teensy, which is an overkill, but I kept having issues with my Pro Mini and ran out of time :) It was made as a present for a friend.

I am particularly happy about the laser-cut enclosure, where for the first time I used matte acrylic. Front panel is split into three sections, with the middle one being transparent black that darkens the LEDs, and looks cool :) This is a pretty compact enclosure, measuring 5.2" wide, 1.2" deep, and 2.2" too (the inner box is only 1.8") on the outside. I had to get creative to fit all the parts in, the way I prefer: using cable joints and not soldering any expensive parts to any boards (so that I can replace them easily).  

You can read about how the rotary knob is used and much more on the project github page below.

https://github.com/kigster/BedTime

Thanks! :)
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Sibi Nehru's profile photoAdam Augustyn's profile photoDouglas Pinheiro's profile photoGianluca Carlesso's profile photo
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Wow it's a great job! 
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"FilxCapacitor" - Music Box / Lights Show / Photo Slide Show / Clock

This box was created as a present for a dear friend at the time of need, and the idea was to create a bed-side clock that can additionally function as a mesmerizing media box, with some uplifting music and photos collected from friends.

Project source code: https://github.com/kigster/FilxCapacitor

Inside, it is powered by Teensy 3.1 with an Audio Shield, two 3W speakers and a small digital amplifier, 4 Adafruit NeoPixels, a Joystick to control photo show and tracks, as well as the rotary encoder on the top to control music volume, or to help set the time in the Time Set mode. 

Audio shield was supplied with a 16GB high throughput SD card, which contained both pictures (in BMP format) and audio files (as WAV), and Teensy was able to playback the files while at the same time reading another file for display!  Pretty awesome. 320x240 TFT display did a great job at keeping color accurate and very bright.  Although to control backlit display brightness I chose to use an adjustment potentiometer, so that I could tweak it after the assembly.

As the box's main and unexciting mode is to be a bedside clock, amber LED display (also from Adafruit) was used to show the current time.  For Teensy to be able to sync the time, a crystal was soldered onto the bottom, and a 3.3V backup battery supplied.

Overall this is probably the most complex project I've ever done with Arduino compatible hardware, and the codebase, when converted to hex used up about 30% of Teensy's enormous memory buffer.

Anyway, this is my first project video, and hope you enjoyed watching it!  Please leave comments if so :)

#arduino   #teensy   #audio   #diy  
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Konstantin Gredeskoul

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Another finished project: bed side clock with neo pixels, light sensor, and seven segment LED screen from Adafruit. It's running on Teensy, which is an overkill, but I kept having issues with my Pro Mini and ran out of time :) It was made as a present for a friend.

I am particularly happy about the laser-cut enclosure, where for the first time I used matte acrylic. Front panel is split into three sections, with the middle one being transparent black that darkens the LEDs, and looks cool :) This is a pretty compact enclosure, measuring 5.2" wide, 1.2" deep, and 2.2" too (the inner box is only 1.8") on the outside. I had to get creative to fit all the parts in, the way I prefer: using cable joints and not soldering any expensive parts to any boards (so that I can replace them easily).  

You can read about how the rotary knob is used and much more on the project github page below.

https://github.com/kigster/BedTime

Thanks! :)
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Cory Virok's profile photoKonstantin Gredeskoul's profile photo
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+Cory Virok thanks Cory! This was fun, and I finally decided to use G+ for cataloging my projects :) 
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Hello!  I am new to SmartMatrix, and have recently assembled it according to your great instructions. 

I am able to load the sketches into Teensy, and see them played back on the Matrix.

The only problem is that upper right quadrant is showing wrong color: when a white text scrolls across the screen, it will show in purple in the top right quadrant, and then switch to white when it exits.

Lower half of the screen is fine. 

Any ideas on what can be wrong with the shield or the matrix?

Thanks!
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Konstantin Gredeskoul's profile photoPixelmatix's profile photo
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Take a look at the Animated GIF guide I posted earlier to the community. If you want to stream video from a computer, you can use Fadecandy, details are in the Projects section of the SmartMatrix site. 
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Konstantin Gredeskoul

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OK boys and girls, here's some sexy electro swing up your wazoo! I am getting to know my NI F1 controller, and throwing some tasty deep tech-house grooves on top of happy fluffy electro swing, and the result will surely make all your things tingle. I promise pinky swear. Give it a shot, and shaky a booty or two for me, will ya? Lotsa love.
LeftCtrl
Swingophrenia Oh Forty
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11 communities

Konstantin Gredeskoul

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Oh Makers Fair!  I think I am returning next year :)
 
+Jason Coon and I met SmartMatrix contributor +Konstantin Gredeskoul at Maker Faire! It was great to meet SmartMatrix contributors and users, and see other peoples projects.

Take care of that finger Konstantin!
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Konstantin Gredeskoul

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Do you need Ops in your new startup? If not now, then when? And...what is Ops? Learn how to scale ruby-based distributed software infrastructure in the cloud to serve 4,000 requests per second, handle 400 updates per second, and achieve 99.97% uptime – all while building the product at the speed of light. Unimpressed? Now try doing the above altogether without the Ops team, while growing your traffic 100x in 6 months and deploying 5-6 times a day...
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A great company where I work, Wanelo, with all of it's 35 people, recently moved to a new office which has only two single-occupancy bathrooms, each on a separate floor.

Anytime you'd need to use a restroom, you'd to the downstairs bathroom only to find its door locked. You'd then run upstairs and find the other one locked too... Damn!  Run back down only find out that someone else grabbed the first bathroom while you were upstairs. Argh!

You can likely see how this could be a frustrating and disruptive experience even just once or twice. Now multiply that by 35 employees and every work day of the year, and you end up with an actual productivity problem.

To solve this problem, I got approved for a small budget of about $200, and started digging. The result is the project called BORAT :) 

You can read full details here: 
http://kiguino.moos.io/2014/10/12/borat-bathroom-occupancy-wireless-detection-and-notification-with-arduino.html

And github page is here:
https://github.com/kigster/borat

#arduino   #diy   #wireless   #lasercutting  
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Rob Martin's profile photoBrodie Bennett's profile photoKonstantin Gredeskoul's profile photoYuan LIU's profile photo
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+Konstantin Gredeskoul Yeah I got price shock from the single-transducer pingers when I started, especially because Arduino IDE's built-in examples use PING instead of two-eyed SR04.  Even though the code change is literally just one character, the shock could well discourage a beginner who doesn't know electronics too well from exploring ultrasonic ranging.

What does Sony distance sensors use?
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Konstantin Gredeskoul

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FilxCapacitor – Teensy 3.1 (Arduino compatible) Music Box, Clock, Lights and Photo Slide Show. See the demo video here: https://www.youtube.com/watch?v=aA2tDJGnlRQ

This box was created as a present for a dear friend at the time of need, and the idea was to create a bed-side clock that can additionally function as a mesmerizing media box, with some uplifting music and photos collected from friends.

Inside, it is powered by Teensy 3.1 with an Audio Shield, two 3W speakers and a small digital amplifier, 4 Adafruit NeoPixels, a Joystick to control photo show and tracks, as well as the rotary encoder on the top to control music volume, or to help set the time in the Time Set mode. 

Audio shield was supplied with a 16GB high throughput SD card, which contained both pictures (in BMP format) and audio files (as WAV), and Teensy was able to playback the files while at the same time reading another file for display! Pretty awesome. 320x240 TFT display did a great job at keeping color accurate and very bright. Although to control backlit display brightness I chose to use an adjustment potentiometer, so that I could tweak it after the assembly.

As the box's main and unexciting mode is to be a bedside clock, amber LED display (also from Adafruit) was used to show the current time. For Teensy to be able to sync the time, a crystal was soldered onto the bottom, and a 3.3V backup battery supplied.

Overall this is probably the most complex project I've ever done with Arduino compatible hardware, and the codebase, when converted to hex used up about 30% of Teensy's enormous memory buffer.
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Konstantin Gredeskoul

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Wanted to share my open source laser-cut enclosure for SmartMatrix 32x32 5mm spacing:

https://github.com/kigster/omnipix/tree/master/enclosure

See the picture below.
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Looks great, thanks for sharing!
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Communities
11 communities
Story
Introduction
I am a software geek, occasional DJ, producer, a musician, table tennis player, and a retired paladin. I am a CTO for Wanelo.com, author @ tektastic.com, and husband to @telene. 
Bragging rights
Two albums on iTunes, three continents concurred, two cats own me.
Education
  • Kharkiv State University, Kharkiv, Ukraine
    Mathematics, 1991 - 1992
  • Monash University, Melbourne, Australia
    Mathematics, 1992 - 1995
Basic Information
Gender
Male
Birthday
June 10
Collections Konstantin is following
Work
Occupation
Independent Consultant, Former CTO @ Wanelo & Infectious, principal at ModCloth, Blurb. Expert in software, data, design, databases, performance. Hardware hacker.
Employment
  • Wanelo, Inc.
    CTO, 2012 - 2015
  • ModCloth, Inc.
    Director of Engineering, 2010 - 2011
  • Infectious, Inc.
    CTO, 2008 - 2010
  • Drop In Media, LLC
    CTO, 2007 - 2010
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
San Francisco, CA
Previously
Kharkiv, Ukraine - Melbourne, Australia
Konstantin Gredeskoul's +1's are the things they like, agree with, or want to recommend.
mc-settings
github.com

mc-settings - Convinient way to manage application configuration across multiple environments