Changing your default Python install: one tiny wrinkle that shouldn’t have tripped me up

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HerpDerp Mucking About With Things Python Sysadminning
So you’ve installed a later and greater version of Python (Python 3.6.1 in my case) in /usr/local/bin and would like it to be used instead of your server’s default (and presumably older) python version when you type python at the shell prompt after logging in? The solution is widely documented. Add the following to the […]

How I got Python 3.6.1 and WSGI working on CentOS 7.3

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HerpDerp mod_wsgi Mucking About With Things Python
I set out to get WSGI going, with Python 3.x, on my CentOS 7.3 VPS. Initially, I began by trying to follow the path laid out in a 2011 blog post (Building mod_wsgi with EasyApache for WHM/cPanel) but with current equivalents of Python and mod_wsgi. That’s a very lucidly written article and it’s apparent from […]

Purikura with props; Or, getting the hang of using a Canon SELPHY printer.

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Mucking About With Things Personal Firsts Spitting Images The Diary of Lupin Pooter
We recently ventured out and acquired a Canon SELPHY CP1200 printer and the specialized paper and paper cartridge necessary for printing pages of photo stickers, eight identical stickers to a page, similar to the photo stickers produced by Japanese photo-sticker (purikura) booths. No small amount of fiddling with camera settings and a few sticker sheets […]

Let’s Talk About Money!

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Mucking About With Things The Diary of Lupin Pooter
Lately, I’ve been spending chunks of my free time futzing with cheap microwave doppler radar sensors and soda-can antennas. Last night, it was all about hooking up teensy all-in-one MP3-players and itsy bitsy little OLED screens to Arduino boards. I’ll write more on that soon. Right now, let’s talk about money. Or, rather, the latest […]

My soldering skillz still leave much to be desired

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Mucking About With Things Personal Firsts The Diary of Lupin Pooter
A new (minor) personal first: connecting and driving a display, from Arduino. Thanks to Adafruit for the tutorial (Monochrome OLED Breakouts) and open-source libraries I’m using to drive this little 128×64 OLED display. Note: I am a repeat Adafruit customer but purchased these particular displays from a Taobao merchant for a fraction of the Adafruit […]

Wind Power Beast-mode and this week’s new word: sprue

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Mucking About With Things The Diary of Lupin Pooter
One recent weekday night, I sat down assembled the miniature Strandbeest shown above from a kit which I’d purchased a week or two earlier. Here’s a YouTube video about the same (or a very similar) kit. From what I can gather by browsing the official Strandbeest site and webstore, this beest appears to be an […]

Photos: WS2812 LED ring, soldering, desoldering

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Mucking About With Things The Diary of Lupin Pooter
Last week, I wanted to test-drive one of the 24-LED WS2812 5050 RGB LED rings I’d bought a ways back. Getting it working, controlled by an Arduino board running the Adafruit NeoPixel library, was easy peasy. Except for the soldering step. For reasons that weren’t apparent to me while I was wielding my soldering iron, […]

Yak Shaving: Resistors, 6500 of ’em, edition

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Mucking About With Things Spitting Images The Diary of Lupin Pooter
Above: what 6500 1/4-Watt, 1%-tolerance metal film resistors (50 each of 150 different resistance values, ranging from 1 Ω to 10 MΩ) look like if you buy them from Taobao. That cling-film/plastic-wrap-wound bundle was roughly the size of an adult’s forearm, from elbow to wrist. Total cost: $USD 10. For reference, Sparkfun’s Resistor Kit (COM-10969, […]

So this is what pareidolia feels like. Huh. Neato.

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Mucking About With Things Personal Firsts Spitting Images
Clicking through some of the photos I took of some of the micro-terrains of a sunflower, I found one that featured something that very closely resembled a creepy staring eye: Instead of being disappointed that there wasn’t a tiny human face beneath the mass of immature sunflower florets looking upwards toward the lens of my […]

Taking a second look at that sunflower

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Mucking About With Things Spitting Images
First, for the sake of comparison, here’s what the edge of one of the green bracts ringing the back of the sunflower’s head looked like through my 60x-100x-magnification clip-on microscope: Now here are two bract-edge photos taken with my 200x-500x USB scope (it’s a Measurement eScope DP-M07) at 500x magnification: I didn’t get around to […]

Exploring a sunflower with a cheap 60x-100x clip-on microscope

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Mucking About With Things Spitting Images
An inexpensive 60x-100x-magnification clip-on microscope like the one shown above can be a shed load of a lot of fun. Last Friday, I spent one of the shortest hours of my life (because TFWYHV) exploring a sunflower, one which I’d just lopped off its stalk, from a bunch that had brightened our home for the […]

Brrrt… Bleep Bloop: Forrest Mims’s 3909-based toy organ

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Mucking About With Things Spitting Images The Diary of Lupin Pooter
If you give the MP3 file embedded above a play, you’ll hear me noodling around with my slightly modified version of the “toy organ” DC circuit featured on page 105 of Forrest Mims Engineer’s Notebook [ISBN 9781878707031]. Using alligator clips, I attached each of the three different types of small 8Ω speaker (left to right: […]