Reddit reviews USB to 2 x 3/4-Pin PWM 5V USB Sleeved Dual Fan Power Adapter Cable
We found 4 Reddit comments about USB to 2 x 3/4-Pin PWM 5V USB Sleeved Dual Fan Power Adapter Cable. Here are the top ones, ranked by their Reddit score.
Power A Pair Of Case Fans Of Your Choice From USB With This CableThis Version Of The Cable Allows You To Power Two Fans From One USB Port12V Fans Will Be Operated At A Reduced 5V Voltage For Silent Operation (Fan Must Have A Start Voltage At Or Below 5V)Quality Construction Features High Density Black Sleeved Cable And Plastic Injection Molded USB HousingCable Length (Including Connectors): 22"
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So a member of the Stress Level Zero team shared a now-pretty-popular image of his frunk fan mod using 40 mm computer fans to ventilate the Headset. I was inspired, so I went on a hunt for the quietest efficient fans I could fine, and that search led me to Noctua's 5V 40mm computer fans. They're listed at only 19.6 dBA (I'd say they're quieter than that - more like having a ceiling fan on in the room), and yet the can still move plenty of air at 5,000 rpm.
The original mod had the fans blowing cool, external air into the headset. I originally tried this and it left me very disappointed as I couldn't sense any air moving. The only time I did feel air moving was when I angled the fans to blow upward into the vents in the upper portion of the frunk, and it was hot air (which would be a disservice to the wearer, obviously). The only pro was that it cooled off the components.
So I simply flipped the fans over and it made a world of difference. There's a slight gap between the HMD and the face gasket at the nose (which does cause light bleed but with the lights off, who cares?), and with the fans sucking hot air out of the headset, a draft is created between the wearer and the inside of the headset, bringing in cool air around the nose and ventilating the inside of the headset. It also does a stellar job of keeping the components cool I've found. I spent about 4 hours in it at one time and not once did I get warm inside of it.
What I used:
Black Duct Tape
2x 40mm 5V Noctua Fans at 19.6 dBA (they're 4-pin but they include 4-pin F to USB M adapters with each fan)
4-pin Splitter Cable to join the two fans
What I would probably use instead:
A better mounting system than duct tape, for one
The same fans
This all in one 2 3/4-pin to USB splitter/adapter
This USB toggle switch to turn off the fans
I started having prints failing because the extruder stepper got so hot, the filament would get soft going through the bondtech gears and jam. I clocked the Extruder Stepper @ 56c and the bondtech gears at 49-52c. It took quite a bit of digging on the internet to figure out what was going on.
I solved it with this print.
https://www.thingiverse.com/thing:2975582
I added this noctua fan and this cable plugged into my raspberry pi. If you start to get some jams this might be the issue.
Here are pics of it on my Prusa.
https://i.imgur.com/cRFDNQB.jpg
https://i.imgur.com/GTrDhtQ.jpg
https://i.imgur.com/zoMAuAp.jpg
With this. I plan on shortening the wires to save room.
I used this one since it goes straight to USB: USB to 2 x 3/4-Pin PWM 5V USB... https://www.amazon.com/dp/B071NN5PSL?ref=ppx_pop_mob_ap_share