shimniok is currently certified at Journeyer level.

Name: Michael Shimniok
Member since: 2007-12-23 16:33:37
Last Login: 2013-08-22 04:57:14

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Homepage: http://bot-thoughts.com/

Notes:

Author of Bot Thoughts blog, interested in robotics since '89. Since 2007, dove in full force, built Pokey the firefighter (failure = learning), and then Data Bus, 3rd place in 2012 AVC, my Rapsberry Pi tele-rover, a beam robot, and have tinkered with lots of other electronic thingies.

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Hero Jr Repaint

Ruining things sucks. I kinda screwed up and my impatience got the better of me. 


I didn't really care for the dark blue Hero Jr. I preferred the original computer beige and burnt sienna trim. So I "fixed" it... I fixed it real good...
I was going to be lazy and just paint over the blue with a nice heirloom white. But no, I decided to use Citristrip on one of the panels and of course I was too impatient to test it on an inconspicuous area. So the stripper works really well. I highly recommend it. But not for plastic. It'll eat plastic. So I found out.

Long story short, the stripped panel will become the back panel, as it's kind of hashed up from me scraping off gooey paint and plastic. I may try sanding it more. It's not too bad. You can't really tell unless you're really close up. You win some, you lose some. 

I picked satin paint for a very good reason.

The plan is to do the trim in aubergine. I am very likely to give the robot a female voice. I think my little girl will like that better than a male voice.

Syndicated 2014-09-16 15:13:00 from Michael Shimniok

12 Sep 2014 (updated 16 Sep 2014 at 00:14 UTC) »

Back to Linux Mint... 13

I installed Linux Mint 17 and have switched back and forth between Mint 14 and 17 for awhile due to instability in 17. I'm using the same home directory I had on Mint 14 which might explain it.

Yesterday, Thunderbird and Chrome kept repeatedly crashing until I logged out and back in again.

The entire computer hung at another point; I couldn't log in remotely, move the mouse, do anything with the keyboard (numlock etc).

At another point, the kernel reported some kind of error/crash/panic/something--can't remember as I was juggling several things at once.

And a few weeks ago, video was going wonky after waking from sleep (I believe they've gotten this known issue fixed since then)...


I fully expect all of these issues to be resolved in the coming months. Meanwhile, I really need two things. First, a stable Linux environment. Second, a supported environment so I can install and update packages, like Festival speech synthesis.

So Mint 17 is gone, replaced with Mint 13 LTS (Long Term Support), based on Ubuntu 12.04; it will be supported until April 2017.

Mint 13 appears to be rock solid so far, zero issues. There are some under-the-covers differences; I couldn't change desktop settings until I nuked the newer config directories. Minor issue. I may be stuck with older versions of some packages, we'll see. And Nemo file explorer didn't come out until Mint 14, but that's ok.

In another month or so I'll give Mint 17 another go and if it's not behaving better I'll try to spend some time reporting bugs.

Syndicated 2014-09-12 14:31:00 (Updated 2014-09-16 00:07:18) from Michael Shimniok

20% Off Labor Day Sale at Bot Thoughts

Get 20% off most items with coupon AF954E4 in the Bot Thoughts store. Thursday through Labor Day. ATtiny prototyping, Parallax Propeller breakout, microSD breakout, RoverMux, and eeZee Power breadboard power supplies.

Syndicated 2014-08-28 12:25:00 from Michael Shimniok

23 Aug 2014 (updated 9 Sep 2014 at 19:15 UTC) »

What the heck is PIPduino?

Introducing PIPduino
Our Jeep's steering servo controller, with this icky baseboard, was missing something. What?

Power and ground rails and a voltage regulator, that's what. So I made a 'duino clone with features for Putting In Projects and called it PIPduino.
  • Color-coded power and ground rails for each analog and digital pin, 
  • Dedicated I2C bus with 4 ports and pullups,
  • Combo SPI / ISP connector, 
  • Serial/FTDI connector,
  • Onboard voltage regulator, and
  • Flexible power options.
Goodbye shields. Use low cost breakout boards instead.

Before PIPduino (ick). And after (ah, much nicer).
Available soon on Tindie.

Syndicated 2014-08-23 00:14:00 (Updated 2014-09-09 18:32:52) from Michael Shimniok

Discovering Linux Mint 14 EOL

A little over a year ago, I converted to Linux Mint 14 for good, leaving Windows (mostly) behind.

Despite some initial bumps (and whining for which I remain deeply embarrassed), I've been quite happy with it and it is an excellent platform for my hobby electronics and robotics as well as for general use.

In the process of reworking my backup strategy, my attempted installation of rdiff-backup with apt complained about unsigned packages. Then bombed out...


Install these packages without verification [y/N]? y 
Err http://archive.ubuntu.com/ubuntu/ quantal/main libjs-underscore all 1.3.3-1ubuntu1
404 Not Found [IP: 91.189.88.149 80]
Err http://archive.ubuntu.com/ubuntu/ quantal/main libjs-sphinxdoc all 1.1.3+dfsg-4ubuntu3
404 Not Found [IP: 91.189.88.149 80]
Err http://archive.ubuntu.com/ubuntu/ quantal/main python-pylibacl amd64 0.5.1-1.1
404 Not Found [IP: 91.189.88.149 80]
Err http://archive.ubuntu.com/ubuntu/ quantal/main python-pyxattr amd64 0.5.1-1.1
404 Not Found [IP: 91.189.88.149 80]
Get:1 http://archive.ubuntu.com/ubuntu/ quantal/universe rdiff-backup amd64 1.2.8-7 [176 kB]
Fetched 176 kB in 10s (16.4 kB/s)
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/u/underscore/libjs-underscore_1.3.3-1ubuntu1_all.deb 404 Not Found [IP: 91.189.88.149 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/s/sphinx/libjs-sphinxdoc_1.1.3+dfsg-4ubuntu3_all.deb 404 Not Found [IP: 91.189.88.149 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/p/python-pylibacl/python-pylibacl_0.5.1-1.1_amd64.deb 404 Not Found [IP: 91.189.88.149 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/p/python-pyxattr/python-pyxattr_0.5.1-1.1_amd64.deb 404 Not Found [IP: 91.189.88.149 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Turns out that Mint 14's underlying base, Ubuntu 12.10 aka Quantal Quetzal, is at
EOL as of May 2014. So I have to upgrade.

Because fresh installation is the only supported option, I'd rather not have to upgrade too often. But there is good news.

First, unlike Mint 15 and 16, Mint 17 is based on Trusty Tahr, 14.10, which is a Long Term Support release which gives me until 2019.

Second, Linux Mint offers a backup utility that lets you back up a list of your installed packages, my biggest concern about doing a fresh install.

I've already stuck /home onto a separate partition so it'll survive a fresh install. It's all backed up nightly to a local drive with Backintime.

Next, I need to back up some software that I manually installed into /opt and /usr/local. In the future I'll put that stuff on /opt and move it to a separate partition, also.

Syndicated 2014-08-15 01:00:00 from Michael Shimniok

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