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1 vote

12 V and 48 V having a common ground?

Here's the schematic showing the 12V and 48 V batteries having a common ground. When short circuited, + 48 V becomes 0 V whereas + 12 V remains + 12 V.
vu2nan's user avatar
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0 votes

12 V and 48 V having a common ground?

If your 12V and 48V systems are indpendant you don't have to connect them but you loose nothing by doing so. However, as soon as there is a connection between the two circuits (e.g. a communication ...
mlx11's user avatar
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0 votes

When a battery is your power source, what is ground?

The answers that say “ground” is arbitrary are correct. One thing to keep in mind is that all the stuff surrounding your circuit is connected to earth (the planet). So, say you have your circuit in a ...
user69795's user avatar
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0 votes

Ethernet layout review: avoid vias or avoid copper under transformer?

As stated in comments by hacktastical: I’ll add that your Bob Smith termination is wrong. Should have a separate 75 ohm to each center tap, terminated to a 2kV cap. More here: Is my Bob Smith ...
5 votes
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Dirty VS clean ground: How to tie grounds?

To expand on the comment from @user1850479: "Noisy ground" arises when you have a lot of current flowing in the ground node, or when the impedance of the ground node is high, or both. For ...
tobalt's user avatar
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1 vote

Dirty VS clean ground: How to tie grounds?

Assuming standard 24V or lower voltage electronics, then the general rule for systems in "dirty" environments with lots of EMI is to connect all grounds together, directly. And eventually to ...
Lundin's user avatar
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1 vote

How do I mark pads on the PCB footprint as not used in KiCad?

The footprint must correspond to the symbol. If footprint has many GND pins then the symbol should have them too. The usual way of doing this is to mark all but one pin with same signal as invisible, ...
Maple's user avatar
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1 vote

How do I mark pads on the PCB footprint as not used in KiCad?

This needs to be done in Schematic Editor prior to switching to the PCB Editor. In Schematic Editor find the No-Connection Flag icon, (short line with an "X", in the right sidebar), click ...
Nedd's user avatar
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1 vote
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How does a socket grounding tester work?

Most have aome kind of lamps and resistors between each pair of terminals. Basically there could be a lamp between live and neutral, live and earth, and just to be sure, between neutral and earth to ...
Justme's user avatar
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2 votes
Accepted

Where to connect transformer ground?

That's quite possibly connected to the shielding winding which is usually an unshorted copper foil or a few turns of magnet wire located between the primary and the secondy. The wire connection then ...
Rohat Kılıç's user avatar
3 votes

Where to connect transformer ground?

The ground needs to connect to the transformer's iron core. This is why it has a ring lug connector at the end.
Jonathan S.'s user avatar
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