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How do I wire ground circuits? Answered

I'm building this circuit, and it uses ground marks which I'm unfamiliar with these kinds of circuits (this is my first one) can anybody explain to me how it works? 

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steveastrouk

7 years ago

Not only that, but ground is UP on the darned drawing.

Steve

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lemonie

7 years ago


Ground is zero volts.
You connect those to a mains-earth/ground, or you arbitrarily call either the -ve or +ve supply "ground". But they all connect to the same common, it saves you the hassle of drawing the wires in the schematic.

L

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steveastrouklemonie

Answer 7 years ago

Not ALL grounds though are equal - we differentiate between a signal ground and a chassis ground in some circumstances for example, and you can have a virtual earth, which is not at ground potential !

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lemoniesteveastrouk

Answer 7 years ago


I like learning things - thanks. Would the signal and chassis grounds be at different potentials?

L

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steveastrouklemonie

Answer 7 years ago

I hate to say this, but, "potentially"
;-)

...at a low level YES, they will be different, because any currents flowing in the grounds will raise their potentials relative to each other...

Steve

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lemoniesteveastrouk

Answer 7 years ago


I get that, practically speaking yes because of the wire, but theoretically no.

L

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steveastrouk

7 years ago

The ground marks makes the diagram easier to read, but this circuit is very badly drawn anyway.

COnnect ALL your "ground marks" together, and connect them to the 0V of your supply