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Stede Bonnett
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I saw in the past couple episodes that +PadreSJ has an 853D. I have one of those and if you turn down the temp the SMD rework is perfect as a heat gun for heatshrink tubing and the like. (I use the medium round tip for that.)

Also I find the SMD unit fits better pointing down, and generally doesn't fall off in that position when you are moving it.

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Previously, +PadreSJ mentioned considering an addon for his battery-powered deodorizer fan that would cutoff in a low-voltage situation to prevent damage to the LiPoly battery packs. That sounded like a good idea to me for battery operation, but as I will generally be using an AC adapter I decided since the fans are audible at full speed it would be nice to quiet them when the area is occupied.

So, this controller has two optional features:
First, it has a battery voltage monitor which will kill power if it drops below a threshold (and stay off until reset) to protect the cells.
Second, a PIR motion sensor that triggers the software to change the fan speed (for a defined time period).
It's also possible to adjust a couple variables so it only runs when motion is detected, and of course you can control the time is stays in that state.

The specs are for 5V micros, but it's really easy to adapt to 3.3V - I might do an IoT version with BT or WiFi that is 3.3V (and that's when you know that this whole project has gotten out-of-hand :-) )

All the interconnects can be made with a mix of header jumper wires which you can buy/make and assemble without soldering.

No case made yet as I'm waiting for some more Pro Mini's to come in. I'm probably going to attach it to one of the screws that holds the top of the filter.

See the link for parts and assembly notes:
https://github.com/iocon/Deodorizer-fan-controller

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Whipped up the 140mm adapter for 6" air filter canister I mentioned earlier:
https://plus.google.com/+StedeBonnett/posts/MBD9rcZwXeG

This is specifically for round 140mm fans like this Noctua NF-P14r. They are very quiet and have higher static pressure than 120mm fans of the same airflow (this one is ~80cfm). These are usually <$17 each and have a 6-year warranty
http://noctua.at/en/products/product-line-redux/nf-p14r-redux-1500-pwm/specification

it uses a slightly smaller inside diameter than the fan shroud to ensure you can get a good seal (with silicone or similar).

https://tinkercad.com/things/hONVyQsMAIh

I printed all of these at .3mm layer height with 20% hex infill on my XYZ davinci 1.0 Pro with Hatchbox black ABS filament. You can see the 9mm 'brim' on the first layer that helps keep it from lifting off.

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This is a 120mm to 6" duct fan adapter inspired by the 4" one from KH224.
https://twit.tv/shows/know-how/episodes/224?autostart=false
It fits on the 6" version of the filter linked from the episode. This is actually my first attempt to use tinkercad, and there was one minor alignment issue with the fan holes (they were mysteriously out-of-place by 0.39mm) that is fixed in the file now:
https://tinkercad.com/things/6fEIuDhbPiS

The upper spherical duct can still be used with a second fan, of course. I am also going to make a version for the 140mm Noctua NF-P-style fans (which use the same hole spacing as a 120mm fan) once I figure out how to get a good seal around it.

Shown here with a 120x38mm Panaflo L1A
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So I was going to B-Sides next month... now I'm going to B-Sides and building a 250 Quad! Look familiar?

Now I have much Syma flying to get ready...

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For Windows users following the Perl module I recommend you try out Notepad++

It offers automatic syntax highlighting for dozens of programming languages (see the language menu) and makes finding things like a missing " or ; much easier. You can also have multiple files open in tabs and if you close the program it will "remember" what files you had open and they will be there next time it starts.

Just save your file with the correct extension and everything will work as expected. It also adds itself to the context menu so it is easy to right-click and open any text file in Notepad++ that you might want to edit.

It can also handle different character encodings and line endings for working with files across platforms.

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Windows 8.1u1 had more updates than I expected...
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Here is an article which hopefully answers the questions you didn't even know to ask about encrypting your computers whole hard drive (or drives).

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Look! It's a small, powerful computer with an even smaller and more powerful computer on top of it.
Intel NUC
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Oddly, that's also my extension at work. The clock says when to get up for ALL THE WAFFLES.
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