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| Digital oscilloscope project/kit |
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| RobWilson:
--- Quote from: philf on January 01, 2016, 03:10:33 PM --- --- Quote from: RobWilson on January 01, 2016, 02:42:01 PM --- My electronics /PCB software can't do a ground plane :scratch: --- End quote --- Rob, Are you sure? I managed to do a copper pour to fill. What i couldn't do was neatly connect a pad to the plane. I've uninstalled it now so can't tell you exactly how to do it. :beer: Phil. --- End quote --- Hi Phil I think I am driving it correctly , I added the copper fill but I cant connect to it :scratch: , I thought just add the copper fill ,then remove/delete all the traces that are at 0 volts , but it just isolates the pads . how did you get a connection ? Cheers Rob :beer: |
| philf:
--- Quote from: RobWilson on January 01, 2016, 03:16:45 PM --- --- Quote from: philf on January 01, 2016, 03:10:33 PM --- --- Quote from: RobWilson on January 01, 2016, 02:42:01 PM --- My electronics /PCB software can't do a ground plane :scratch: --- End quote --- Rob, Are you sure? I managed to do a copper pour to fill. What i couldn't do was neatly connect a pad to the plane. I've uninstalled it now so can't tell you exactly how to do it. :beer: Phil. --- End quote --- Hi Phil I think I am driving it correctly , I added the copper fill but I cant connect to it :scratch: , I thought just add the copper fill ,then remove/delete all the traces that are at 0 volts , but it just isolates the pads . how did you get a connection ? Cheers Rob :beer: --- End quote --- Rob, You have to draw a track from the pad to the filled area. (I found somewhere in the help that told me that was the only way.) I found this in one of their tutorials which shows the filled area but no connections to any pads. I don't know if you can get sufficient clearance for the pads for your transformer or whether you're stuck with a standard clearance. There will be a way round it I'm sure. Other software allows you to specify on the pad properties if it's isolated or not. In my PCB I used one plane for 0v to connect to my Pi and one plane for the 0v from my proximity sensor inputs. I wanted to keep both sides completely separate to keep the 24v away from the Pi which is limited to 3.3v on the inputs. :beer: Phil. |
| Bluechip:
--- Quote from: John Rudd on January 01, 2016, 02:53:08 PM ---Dave, But I think the distances between the copper infill are a bit close around the transformer.... :scratch: I prefer at least 6mm creepage distance for safety... :zap: --- End quote --- Yes, quite right, there should be more clearance. Did it when I was sober, [ or very nearly ], brain would be lacking some essential toxin and thus not on top form. Rectified now. Back on full power, like a re-gunned CRT. Dave |
| modeng200023:
I have been following this topic with much interest. Rob and John or anyone else with experience of using this scope, after using it for a while do you have any reservations bearing in mind that it is resonably priced? The other thing I'd like ideas on is a case for it if anyone has thought about ready made ones. John |
| RobWilson:
--- Quote from: modeng200023 on January 02, 2016, 09:22:01 AM ---I have been following this topic with much interest. Rob and John or anyone else with experience of using this scope, after using it for a while do you have any reservations bearing in mind that it is resonably priced? The other thing I'd like ideas on is a case for it if anyone has thought about ready made ones. John --- End quote --- Hi John £15 delivered its a cracking bit of fun ,it has nowhere near the capabilities of a good or even low end bench DSO ,but for £15 I really can't find fault . It has also generated a good bit crack on the forum and lead to other topics like a 3DP case , so if you could CAD model a case maybe someone could print one for it , I may stick mine in an ally case , I bought longer bush buttons that come level with the screen , I just need to find away to bring the slide switches forward . or there is this kits . http://www.banggood.com/DSO068-DIY-Oscilloscope-Kit-With-Digital-Storage-Frequency-Meter-ATmega64-AVR-Microcontrol-p-981017.html More than double the price ,but it has a case . Maybe the more experienced chaps could chip in with some oscilloscope advice :thumbup: Cheers Rob |
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