ShadowRam

joined 2 years ago
[–] [email protected] 1 points 2 years ago* (last edited 2 years ago)

Stuff with motors are, like air con and refrigerators. Those are better left on AC.

No. Trend is they are all showing up with frequency drives. Of which those inverters are rectifying to DC before making their own AC.
Efficiency gains are massive of a frequency drive , hence why they are doing it.
Would be even better if they could drop the first rectifying circuit and just use the inverter portion only.

You lose very little by rectifying AC

You lose a lot actually in all the small cheap rectifiers that are in every device in the house.

Where a single purpose designed FET rectifier that is built for efficiency at the breaker would be drastically better.

[–] [email protected] 1 points 2 years ago

You wouldn't have to.

Every device instead of having an expensive PD communication device in it, would have an even cheaper PWM DC Step-down.

No communication needed.

Each device would just draw what it needs to.

[–] [email protected] 1 points 2 years ago (2 children)

_ It wants 3.3V, or 5V, or 12V, or 48V, or 18.7V,

Exactly

That's why if you had a 110VDC supply at the wall, you do a simple PWM step-down to the required voltage in every device.

LOADS cheaper/efficient than any USB-C PD circuit...

Saves on transformers, saves on dozens of USB PD wall outlets, saves on communication needed to communicate the PD required between each device and every USB PD wall outlet.

Much cheaper. More efficient.

If only the wall was 100VDC instead of AC

[–] [email protected] 1 points 2 years ago

No, AC requires large heavy transformers and then rectifying.

DC dropping down to a lower DC is way easier and more efficient.

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago) (1 children)

Well, I mean if you don't understand power electronics I don't see how you can make that statement.

[–] [email protected] 1 points 2 years ago (2 children)

What?

Most vaccums are brushless, where they are already converting the AC to DC internally. Your vacuums would be cheaper.

Where would I recharge batteries for my lawn care equipment?

again what? The same way? Your charger is converting AC to DC. You could skip that step.

All of these appliances would work better/cheaper with a 110VDC@15A source.

[–] [email protected] 2 points 2 years ago (1 children)

powerful DC-DC

No, are you not aware how these work?

A step down DC-DC is nothing compared to a transformer rectifier or PD electronics with communication with a USB-C.

[–] [email protected] 1 points 2 years ago (3 children)

again, simpler and cheaper electronics for everything

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago) (3 children)

PWM DC to DC dropping voltage to what you need is easy/cheep.

So instead of a big transformer + rectifier that each device has now, it would be a much smaller/cheaper step down at like 99.8% efficiency

[–] [email protected] 14 points 2 years ago (2 children)

Bible belt thinks he's the anti-christ and wants him to ruin the world so they can have their rapture.

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago)

Yeah, but frequency drives/inverters were still pretty pricy things back then to for high powered motors for compressors/blowers/etc.

But the cost and efficiency of those things have dropped SIGNIFICANTLY in the past decade..

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago) (5 children)

_ I don’t think USB C PD could handle a hairdryer though_

Of course it wouldn't. The idea would be get rid of USB-C and PD completely.

You'd have 110VDC@15A available for your hairdryer. Heating coils don't care if it's AC or DC, and the blower fan would be a brushless fan.

You're compressors for AC or fridge would be freq drives, which are cheaper because they could drop the rectifier circuit, and highly efficient.

The only real concern about having DC in the home as standard is the safety aspect of DC doesn't let go if you get shocked.

But that is already being worked on in general as many homes have high-voltage DC circuits from solar panels.

 

I wanted to mount my Dremel to a bench, but the original model by Faklam had a ring the Dremel didn't fit though (I later realised that the top can be screwed off). So I cleaned up the model, made the ring bigger, and ended up almost remodelling the whole thing. Unlike the original, the head of the tool is pressed against the small ring rather than going through it, which should be stable enough for most applications. For printing, I used supports for only the most horizontal parts of the rings. In this case I used a 0.6 mm nozzle and a layer height of 0.36 mm, as this model doesn't require much detail :)

 

This design has been updated with AUX port. You can find this new design at: https://www.thingiverse.com/thing:5767765 My PC has USB 3.0 ports only from its back (yes, it is already getting mature). I wanted to bring some of these to my desk to avoid having to 'deep dive' every time I need to connect something reasonably fast way. I have bought this cable and designed under-desk holder for it: PremiumCord USB 3.0 Super-speed 5Gbps A-Ahttps://www.alza.cz/premiumcord-prodluzovaci-kabel-usb-3-0-super-speed-5gbps-a-a-mf-9pin-2m-bila-d6696333.htm I think the design might work for some other brands as well as it is quite common shape for this type of wire. You should use 2 pcs. of 3mm screws to fix it to the table - whichever length works for you, I have used 16mm. Easy to print, but you need to position the objects properly to the printing bed. Consult the picture for object orientation on the bed. I have used 0.6mm nozzle, orange PETG filament, 55% infill and supports. Happy printing :o]

 

100mm flexi hose holder

 

Deux appareils pour faciliter l'ouverture des bouteilles avec bouchons vissés. pour les fixer sur votre réfrigérateur vous pouvez coller 4 aimants diamètre 6X2mm. Voici un lien pour les aimants. Vous pouvez imprimer séparément les deux fichiers. https://www.amazon.fr/gp/product/B07RT9MY52/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1 Two devices to facilitate the opening of bottles with screw caps. to fix them on your refrigerator you can stick 4 magnets diameter 6X2mm. Here is a link for the magnets. You can print both files separately. https://www.amazon.fr/gp/product/B07RT9MY52/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

 

Small latch for cabinet, little door, to attach something to other thing. Works well also as printer test. Gap between parts is 0.2 mm. Can be printed fully working on place without supports as shown on video. If you have problems with movement most likely problem is stringing. https://youtu.be/MCwRCMNyMc4

 

This adaptor is to connect 1 1/4in hose to 1 1/4in hose. I've used 2x R-20 o-rings and it seems to seal well or you can use Intex 1.25in Dia Hose Seal.

 

Similar to a previous design (https://www.thingiverse.com/thing:6088152), but much better ventilated. I'd been wanting to use a Voronoi pattern in a project and discovered an online resource for converting 3d models into printable "Vorinated" bodies (https://www.voronator.com/). The site has its limitations, but it's free and easy to use. The alternative is to use a Voronoi plug-in in your design software which will give you a lot more control. I printed this vertically without a raft or supports. It's a good idea to bury the model into the build plate a little bit (say 1mm) so you have a decent base layer to start from. This will string a little so maybe turn down your hot end temperature or up your retraction. I did neither and it turned out fine.

 

Updated20230727 Someone send me feedback that the snap place is too tight and hard to separate, so I modified all 4 models, you can try the new one. Updated: Someone said the angle of the hanger is not good, it might form a bad shade of the clothes, so modified the angle, you can download the"Foldable Hanger_angle" and"Foldable Hanger_tight_angle" files to replace the old one. It's a Foldable Hanger that can be printed all at once and with no support. Specially designed for travel, very compact and reliable. There are 2 versions, the tight one for high-precision printers and a normal one for others. watch the video for more information: https://youtu.be/QII3ODl7uRc Click"like" for me if you really like it, it will encourage me to design more new things. See my other designs at: https://www.thingiverse.com/wuguigui/designs Thank you!

 

I've blocked all of feddit.de

I went do https://kbin.social/d/feddit.de

Clicked the block button, my profile shows the domain is blocked,

But I'm still seeing a lot of feddit.de posts in hot.

Is the block domain feature not working anymore?

 

Terms of Use: I spent hundreds of hours designing and iterating these organizers. All I ask in return is to subscribe to my YouTube and to watch the video where I design these bad boys.https://www.youtube.com/channel/UCaqk58gfGcDKyc1l4IGP_vQ?sub_confirmation=1 OR YOU CAN JUST BUY IT: Adapters for any tool combination are for sale on Amazon:https://amzn.to/3LjpfM6 Credit: For the battery connection I modified this file to make a tight fit, please give them the credit they deserve:https://www.thingiverse.com/thing:4850997 Disclaimer: Please be very careful as adapters can cause damage to your tools and even catch them on fire. There has been no confident safety test conducted in the making of this design. Use at your own risk.

 

The first 1,000 people to use the link will get a 1 month free trial of Skillshare: https://skl.sh/christopherhelmke07231This is the beginning of a video ser...

 

I've created this clip from zero because the basic ones I found were too small and my sunglasses fell down every time I was driving. With this one the sunglasses are perfectly placed and stay in place. I am personally using brillenhalter_v2-2_filled of my uploaded versions because it fits the best. The alternative to this one is brillenhalter_v2-1_filled. The other two were designed for larger sunglasses and need more time to print because of their uniqe design. V2-2 Versions got a small bump on the top to hold the glasses better in place, please note that you should take your glasses only when standing still, because you need to hold the clip a little bit, so it doesn't fall down from the sunvisor. Otherwise I can just recommend it. The rear "hole" is for thinner glasses that would easily slip out. Printed for my Audi A5 Cabrio but it fits other sunvisors as well.

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