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BreedJ
BreedJ 5 hours ago
There are a lot of pc scopes which use USB. Only some use network, like the red pitaya does. An example of such an application with usb is the PicoScope. They use USB 3 and can sent 150MS/s continously. The NCSA would only need a 15Mbyte/s or so when samping at 1.1Ms/s. Your video driver should not be the bottleneck. It is when sending video to your pc, your video driver has a lot to do because it updates a big part of the frame and it has to decode the mpeg in real time. Updating a scope signal with a double buffered canvas can be quite fast. Its just removing a line and drawing another one. That should be a piece of cake for your video driver. If you do it the right way of coarse. The way we use in the current NCSA client is also not the correct way. I will change that soon. But its al theory here. I never really tried. But I like to try it out sometime. And yes, noise is a problem, but can be suppressed with caps and ferrite beads. An optical (galvanic) link between the usb and the measurement electronics with separate power supplies would be the best solution. The usb side can be powered by the USB port. I contacted Neal. Neal was enyoing the summer. That's why nothing happened. We will slowly startup the project again when the days are getting colder and shorter. But the bootloader will not be a high priority functionality. That functionality will only be interesting if Elektor is willing to incorporate it in products they sell in the future. Otherwise it has no point because you will need a programming tool to upload the bootloader. I find the diamond hotend quite interesting. Its huge. I've always liked the E3Dv6 series it uses. Its one of the best. I hope it works out for you. I've got two drones now. The largest is more than 1m in diameter and has 8 577W 400kV motors with 300mm propellers. It runs on 22.2V with a 16Ah LiPo battery (for 15 minute flights). A total of 4.6kW maximum power. It ways about 6kg total and can carry 4kg extra payload. But I think I will sell it. I like building them. But flying is a bit boring. Here in the Nehterlands there are new regulations coming up. It will not be allowed to fly more than 100 meters away and not higher than 50m. Also flying FPV is not allowed. So its no fun unless you are a photographer. But then you will need certificates and always fly with two persons. One pilot and one photographer. I'll stick to my helicopters (TREX 600) instead. Those are the same size but more suitable because you usually do not fly more than 100m away.
New Software for Network Connected Signal Analyzer
AndiM
AndiM 1 day ago
Hi Lucky, you're right with the PIC16F628. But I had a lot of these PIC's in my private stock, because this was my first PIC. I made a new version with PIC12F1840. I don't published the new version because elektor will publish this project in elektor magazine. I don't have a publishing date. regards AndiM
Dimmbare Aussenbeleuchtung / Dimmable Outdoor Lighting
RICH OBERMEYER
RICH OBERMEYER 2 days ago
I would like to see an app that got even close to 480 Mbits on USB.  I did a few USB projects and speeds could never get very high with USB.  To much Winblows code in the way.  USB 3.0 doesn't help.  The video driver may be different but the other drivers stink on throughput. If I put 2 USB cameras on the same USB root hub on my 3D printer for pick and place it crashes the computer.  Most laptops only have one root hub for users.  Not even close to 480Mbits and the PC can't handle it.   More important it picks up noise and ground loops from the computer which is huge.  Makes analyzing low level signals impossible.  Continuous traffic trashes USB in my experience.  Not going there again. However I have TCP connections doing plenty of traffic with no problems. For POE I use a POE adapter which is a wall wart so the high end router is not needed.  The adapters are cheap now. The problem with high speed printing is generating enough hot plastic so it can move quickly and then a low speed mode for slowing it down.  No mechanism to handle the difference.  I am trying a 3 headed design (diamond) http://reprap.org/wiki/Diamond_Hotend  now.  The top of the printer is off now while I add 2 more extruders.  That has potential to solve the problem.  Smaller heat chambers but 3 of them for speed when needed.  I would post a video of the 3D printer but here it is out of context.  This thread is for Neal. Nice Drone!  Mine has only been 10 inches or so.  No manly ones like yours and your copter.
New Software for Network Connected Signal Analyzer
greenlicium
greenlicium 2 days ago
btw... thanks for the package... .zip! it's great
Solar grid tie inverter re-engineered
greenlicium
greenlicium 2 days ago
this low cost grid tie is a single stage inverter with unfold bridge. Input capacitor is crucial!
Solar grid tie inverter re-engineered