- Joined Nov 19, 2019
What about when you are in Australia?I think it was just carelessness on the part of whoever created the schematic and I'd connect them together.
As a matter of principle, I wouldn't use any circuits from someone who drew a ground symbol upside down. Ground should always point down.
The generally accepted symbols are:
View attachment 209180
I meant no disrespect to Australians or their country. I'm not going to take any trips by plane until they can do it safely or there's a vaccine for COVID-19.Then he said, you could possibly seek asylum from the US. Before that sometime he said, you should live in a civilized country.
Well, AFAIK, the most stressing moment is when the plane, after crossing the Equator, starts flying upside down until destination.I meant no disrespect to Australians or their country. I'm not going to take any trips by plane until they can do it safely or there's a vaccine for COVID-19.
Most schematic capture tools connect global signals by name, so all of those connect to the signal named "GND". Some tools reserve the traditional ground symbol for Node 0 (but some allow you to also associate a named node with it). It's hard to say without digging into either the documentation for your schematic capture tool or examining the netlist.
Thank you all for your replies! The part of the schematic I posted is from a widely used 3D printer main board called "Mini-Rambo". You can see the rest here: Complete schematic.Most schematic capture tools connect global signals by name, so all of those connect to the signal named "GND". Some tools reserve the traditional ground symbol for Node 0 (but some allow you to also associate a named node with it). It's hard to say without digging into either the documentation for your schematic capture tool or examining the netlist.
But which node they are connected to is only the start of the battle -- there are many other issues that might need to be taken into consideration from a layout standpoint. It's possible that the intent of using the different symbols was to at least hint at these, such as a digital ground and an analog ground that, when all is said and done are, to first order, the same node.; but I wouldn't bet on it.
well, an earth-gnd symbol can also be referred to as a power-gnd. I referred to "traditional GND" as a GND symbol that is more commonly used. the power port "bar" symbol is normally used to identify a positive voltage source. Using that power port "bar" symbol for GND isn't the best practice (at least that is what i was tought), but as long as the net names are the same, the software tool should tie them together during layout. There are also other GNDs in the schematic which have different net names (GND1 and FGND).It was not a comment but a question.
Mostly the wrong symbol is generally used.
Or mis-use of the earth-GND symbol.
Thank you. I am going to do the test and see thenit looks to me like one of the grounds used a traditional gnd symbol while the other used a "power port" (see how the 12V or VCC have the same symbol as one of the GNDs. Like mentioned above, they should be tied together via net name when doing the pcb layout but it wouldn't hurt to verify. If you have this pcba in your possession, I would manually check the resistance between those two nets.
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by Jake Hertz
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