Get The Fog Out-Winter Edition

###Background The Get The Fog Out (GTFO, thing:5936549) is a great project. It had at its base goggles marketed for airsoft activities. The purpose of this project is, principally, to modify the original GTFO idea into something better suited for snow goggles. Accordingly, I chose a widely-available, inexpensive snow goggle (around US$30, specified below) as the base of my design. In the future, if I, or others, find additional goggles that work with this Winter Edition design, even if it requires minor modifications, those goggle models (and any needed mods) will be listed below. I have no reason to think that non-snow activities, including airsoft, could not use all or parts of the following design. Like so many Maker projects, it is really a matter of personalized preferences. That said, if you plan to use parts of this design in activities where people are shooting things at you, please make sure that you choose the right materials and components to remain safe. I am not responsible for bad outcomes resulting from your choices. The problem to solve: Fog in eyewear (or glassware) often results when two bodies of air, at different temperatures and humidities, bump up against each other. The moisture in the warmer air makes contact, through a lens (or building or car window), with something colder (such as cold air), and converts humidity in the warm air back into liquid form, forming little droplets on surfaces. In snow sports, generally the warmer, wetter air is between your skin and your snow googles. The cooler air is on the outside of your lens. One way to solve this is to pull the humid warm air out of the goggles. I’ve seen and even tried such a design before. A similar method, used here (and my preference), pushes cooler, dryer air from the outside into the goggle, which in turn pushes the warmer air inside your goggles out through the vents. By doing this, the difference in temperature and humidity across the lens is reduced, reducing fog. Many snow goggles advertise having fog-resistant coatings. In honesty, those work pretty well in many situations. However, if you wear glasses under your goggles, the anti-fog protection on the glasses is often significantly less impressive than what is found on a snow goggle lens. After all, with most glasses, air between your face and glasses can easily exchange, so normally fogging is not much of concern for regular glasses. As such, glasses wearers are more likely to find their glasses fogging than the actual goggle lens. This is where my story began. This project comprises building a couple of things, 1. Blower assembly, 2. Goggle inlets, 3. Speed controller [Not strictly required, but encouraged]. Each part comprises 3D printed parts and affordable, purchased items. Not all parts are needed, so it is encouraged that you determine which “Optional” parts you will skip before you get start printing and buying. ###Master Parts List: Part A 5015_GTFO_small_v13c.stl (Borrowing heavily from the original GTFO blower case) Part B GTFO_cover_small_v13b.stl (Borrowing heavily from the original GTFO blower case) Part C adapter_v7c.stl (modified from original GTFO tube adapter) Part D GTFO_side_inlet_v8_emboss.stl (need 2) Part E GTFO_split_ring v10c.stl (need 2) Part F Top USB 5V Fan Speed_v11.stl Part G BOT USB 5V Fan Speed_v12_emboss.stl (likely needs printing with supports) Part H strap_clip_50_14_12.stl (need 2) Part I helmet_to_blower_clip.stl Part J Amazon.com : OutdoorMaster OTG Ski Goggles - Over Glasses Ski/Snowboard Goggles for Men, Women & Youth - 100% UV Protection (Black Frame + VLT 47% Gray Lens) : Sports & Outdoors (Other goggles can work, as long as there OTG, the only likely change would be how to attach the air inlets to the goggles.) Part K [Optional] Shims to secure parts; see below Part L 50mm 5015 Tiny Cooling USB Blower Fan 5V Amazon.com: WINSINN 50mm 5015 Tiny Cooling USB Blower Fan 5V, 50mm Micro Mini USB 5 Volt Fans Blower Turbine Turbo Dual Ball Bearing, 1000mm/39in Cable Brushless Cooling 50mmx15mm (Pack of 4Pcs) : Electronics (only need 1) Part M Short USB Extension Cable – 3ft https://www.amazon.com/Cable-Matters-3-Pack-Extension-Extender/dp/B00N9HRTFU (need 2 or 3) Part N ruthex M4 Threaded Inserts Short - 50 Pieces RX-M4Sx4.0 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components: Amazon.com: Tools & Home Improvement (only need 2) Part O iexcell 100 Pcs M4 x 25mm Thread Pitch 0.7 mm Alloy Steel 12.9 Grade Hex Socket Button Head Cap Screws Bolts Kit, Black Oxide Finish: Amazon.com: Industrial & Scientific (only need 2) Part P [Optional, as many heat set insert tutorials just use a normal conical solder iron tip, which will be fine for most. This Part is specific to the job of installing heat set inserts] Heat Set Insert Tool,Tips for Threaded inserts M2 M2.5 M3 M4 M5 M6, Soldering Iron Tips for 3D Printer Users https://www.amazon.com/Tips-Soldering-Iron-Compatible-Components/dp/B0DB1SSKVN (only need M4 size) Q Solder Iron (any compatible with the installing heat set inserts, most will) Part R 3/8" ID Silicone Tubing, Food Grade 3/8" ID x 1/2" OD Flexible Pure Silicone Hoses https://www.amazon.com/dp/B0CQCLKXQ1?th=1 (only need two 12” lengths) Part S USB to 3pin/4pin PWM 5V USB Sleeve Fan Power Adapter Cable with USB Fan Governor Speed Control Knob Amazon.com: Gebildet 3pcs USB to 3pin/4pin PWM 5V USB Sleeve Fan Power Adapter Cable with USB Fan Governor Speed Control Knob ON/Off Switch : Electronics Part T USB Fan Governor Speed Control Knob ON/Off Switch Output range: 3V-8V https://www.amazon.com/dp/B0D97BW45B (Only need one) Part U 5V powerbank ###Blower Assembly Detailed Blower Assembly build instructions are available at https://link.laberteaux.org/5015_blower_assembly_build Edit on Tinkercad: https://link.laberteaux.org/5015_blower_tinkercad ###Goggle Inlets Detailed Goggle Inlets build instructions are available at https://link.laberteaux.org/5015_goggle_inlets_build ###5V Fan Speed Controller (Robust Edition) Detailed 5V Fan Speed Controller build instructions are available at https://link.laberteaux.org/5015_5V_fan_speed_control Additionally, this part has been published as its own, separate thing: https://www.thingiverse.com/thing:7326097 ###Final Build Detailed Final Build Instructions are available at https://link.laberteaux.org/5015_final_build