Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [ground-loop]

For questions about ground loops, which occur when multiple ground nodes in a circuit (which should be at the same potential) actually have a potential difference between them. This is usually caused by a significant current flowing between the ground node(s), thus producing a voltage between them. Ground loops cause various problems in a circuit.

For questions about ground loops, which occur when multiple ground nodes in a circuit (which should be at the same potential) actually have a potential difference between them. This is usually caused by a significant current flowing between the ground node(s), thus producing a voltage between them. Ground loops cause various problems in a circuit.

See Wikipedia's article on ground loops for more information.

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What is the exact definition of a ground loop? Does a ground loop always have planet Earth in series?

I'm confused as to the exact definition of ground loops. It seems to me that there will ALWAYS be a ground loop if you have: 2 devices (both grounded). a data cable between them. You now have a loop in the safety ground wires and the ground of…
Xunie
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Could the grounding of this circuit cause any issues or be improved?

These two boards are supplied from a 24 V power supply like in the picture shown. I didn't design any of them. The first board cannot be modified at all, the second board can be modified completely. The two microcontrollers communicate using I2C…
Marcos
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Determine ground Loop

I have designed a board that is acting weird when you touch the touch screen, turn on and off relays, and even if you touch any wire specify ground(on jacket of wire). I want to know how can I determine this is due to ground loop or not. Below image…
Shahreza
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How can the earth ground loop be modelled for this case?

Below is a single ended system where the source and and the receiver are both earth grounded forming a ground loop through the earth which has a resistance of Rearth = 1 Ohm. simulate this circuit – Schematic created using CircuitLab As shown…
cm64
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Need help to find the ground loop path in this diagram

I have been told that there is a ground loop in this diagram especially via USB_GND, Power-, GND. But I don't understand what that means. All the power supplies are SMPS. Can someone draw the loop on my diagram below: Arduino's digital output above…
user1245
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eliminate 24v - ground loop that is destroying components

simulate this circuit – Schematic created using CircuitLab I built a suitcase boom box using a cheap BT Rx module and an amplifier module. The BT module is 12 vdc and the amp has an upper voltage input of 24Vdc, so a pair of 5 Ah 12vdc batteries…
regretoverflow
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Should I worry about ground loop in power supply circuit for 3G modem or WiFi?

Can someone explain clearly what is ground loop and when we should worry about it? Shall I worry about it when I connect two USB wires in parallel to deliver power to my 3G modem? I have something like this: I was asking about this earlier, here…
Kamil
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