FEZ Cobra II (NET) - USB powered?

Can the FEZ Cobra II (NET) run on USB power through the USB host port?

No, as a host it supposed to provide the power through that port.

Ok, let me rephrase:

Can the FEZ Cobra II (NET) be powered by a USB port alone?

When you connect it to your computer it is powered through USB port. The final answer depends on how much current the port can provide (PC USB port ~500mA) and how much current does the Cobra needs (this depends on modules connected to Cobra)

@ Architect - No additional modules planned at this time.

You should be good!

P.S. Nice blog! I like AntiGravity #2 :slight_smile:

@ Architect - Thanks!

If my initial experiments with Gadgeteer pan out, I hope to eventually rewire my Z406 powder printer with new electronics and either replace the inkjet heads with something that is more available (The HP10 heads are no longer being made, and this beast eats at least one or two heads a week) or switch to a completely different powder binding system, such as mounting a diode laser on the x/y gantry and using nylon or sugar as the powder.

@ dthorpe - Very interesting. In case you haven’t seen this before:


That printer uses light as well.

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That is very cool!!

Interesting that they can get good accuracy on the Z, seeing that some of the water drops don’t always fall straight down but run down the side of the tube.

@ Architect - Yes, there are dozens of photoresin 3D projects out there now.

I like the PeachyPrinter principle, but I detest their slick & sleazy pitch video.

I’m encouraged to see that they’re using bottom-up scanning. Several armchair coaches in various forums stated emphatically that UV activated resins wouldn’t work on the surface due to oxygen inhibiting the polymerization reaction.

I don’t have the patience to wait for their Oct 2014 delivery target. I’ll build my own before then. ;>

@ dthorpe

Sounds like a very fun project! I would like to build one too, eventually :slight_smile:

Drops that fall through air have the same volume displacement on arrival as drops that slide down the side of the tube. :stuck_out_tongue:

Plus, it’s not one drop per Z layer. It’s probably dozens of drops per Z layer for that tiny build vat, so any moisture left clinging to the walls of the tube will be minor compared to the volume required to raise the level of the vat. Plus once the interior of the tube has been sufficiently “wetted” (think: initialization), it won’t continue to steal fluid away from the system. Gravity will eventually win.

Using salt water to float the photoresin is a clever touch. Saves you from needing a gallon of very expensive photoresin to build something 6 inches high. However, there is a limitation in replenishment - if you don’t start with enough photoresin in the vat for the size of the part you’re making, you can’t easily add more resin during the build because that will throw off the Z level.

Photoresin 3D printer DIY projects I’m aware of:

Form1 http://formlabs.com/products/our-printer
B9Creator http://b9creator.com/
mUVe3D http://www.muve3d.net/press/
Pryntech http://pryntech.com
Peachyprinter http://peachprinter.com

and I’m sure there are many, many more.

Another thing that bugs me about PeachyPrinter is that they are running campaigns on Kickstarter and Indigogo at the same time. Seems to be less about the product and all about the money.

@ dthrope Pryntec or Pryntech?


@ Architect - Pryntech, with the h. Posted edited. Thanks!