The grounding tag has no wiki summary.
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High voltage metallic shield grounding
What size of conductor I have to use to ground the shield of a high voltage cable? I would guess that the size of the grounding conductor is related to the size of the cable, but I'm not sure.
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1answer
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Grounding conductor size
Is there an international standard that specifies the size of the grounding conductor to bond a metallic part of the installation to a grounding bar?.
And to connect the grounding bar to the ...
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2answers
154 views
Why we use ground
I have been wondering this for a while, so I did some digging, and as usual, wikipedia was the most illuminative. It looks like the telegraph was the first time ground was introduced to complete a ...
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4answers
183 views
Should NC-Pins of IC connected to ground through a resistor to prevent noise?
I wonder if unused pins of an IC, lets say an NE555 f.e., should be connected to ground via a resistor to prevent noise or not. I have an AVR with analog inputs and just realized there's huge noise, ...
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2answers
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Why the measured voltage increases when I change ground reference?
The following image shows my connections:
The grounds of all devices are connected to a common PCB. When I measure the 1.2V referenced to the ground on my PCB, it reads 1.201V which is great. But ...
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3answers
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Why on earth are o-scopes earth referenced?
Thinking about it: You would never find a "Grounded" multimeter as robust and useful if a path to ground through the multimeter were introduced, modifying the circuit's behaviour and possibly damaging ...
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3answers
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building my own lc meter - multi point gnd
I'm building my own lc meter using the attached schematic. What I don't understand is why there is more than one path to gnd? Does it not eventually get connected to the same point?
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5answers
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Noise reduction strategies in electrophysiology
When recording electrical signals from cells (in a dish or inside a living human or animal body), one major problem is to increase the signal to noise ratio.
These signals are usually in the 10uV ...
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3answers
314 views
Why should a circuit be grounded?
Why should a transistor circuit be grounded? The way I understand it is that ground is an infinite supply of electrons and so it is equivalent to the negative terminal of a battery. But in this page , ...
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1answer
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How should I organize this star grounding network?
I am trying to lay out a PCB for a SEPIC switching regulator. However, I cannot be sure how to layout the ground tracks. My area and budget are limited and my components are big. A picture says more ...
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3answers
171 views
Why would a power supply unit with insulating case and galvanic separation need a grounded power cord?
Recently I witnessed an external IBM laptor power supply that looked like a usual switched-mode power brick (rather small and lightweight for it more than 50 watts power) in plastic case but had a ...
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1answer
205 views
How am I able to jump my car when I ground one of the jumpers?
Electrically, when I think of jumping my car, I visually see basically putting a stronger voltage source in parallel with a weaker voltage source (see http://imgur.com/qz8jX). However, on every car ...
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2answers
147 views
Newbie: ATmega32u2 USB-powered - how to ground?
In ATmega32u2's reference manual, there's a diagram for USB-powered application like shown below.
Should I, or should I not, connect the GROUND to VSS/UVSS line? And why? If not, then what to do, ...
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4answers
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Should chassis ground be attached to digital ground?
I'm working on a PCB that has shielded RJ45 (ethernet), RS232, and USB connectors, and is powered by a 12V AC/DC brick power adapter (I do the 5V and 3.3V step down on board). The entire design is ...
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1answer
160 views
how much is it safe to common-ground power supplies?
Some circuits requires more than 1 power source for voltage comparison or whatever reason and the circuit requires that the power sources shared the common ground. Most of the time it works perfectly ...
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2answers
246 views
Grounding of ADC grounds
Fast, high resolution ADCs, especially ones that have parallel output, usually have a separate supply pin (DRVDD, (drive vdd) or OVDD (output vdd)) presumably because they don't want to couple noise ...
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4answers
528 views
How does earthing work when earth is dry?
Earthing is meant to provide reliable contact of an electric appliance to earth so that if there's an insulation fault current goes into earth instead of through a person's body. This requires ...
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1answer
319 views
PCB 'Emi proof' design
Currently I'm designing a GPS basestation which will have a radiomodem (broadcasting at 407-480MHz), a ARM7 microcontroller running at 60MHz and a FTDI USB chip. The FTDI USB chip even runs at 480MHz ...
