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chassis ground definition

R

Rich Grise

Jan 1, 1970
0
I am view this circuit drawing with this symbol in various places:
http://upload.wikimedia.org/wikiped...hassis_Ground.svg/40px-Chassis_Ground.svg.png

Now, is that is same as a normal ground, or should I be doing
something else different other than just connecting it to the ground?

If by "normal" ground, you mean "earth ground" or "safety ground", then no.
It's called "chassis ground" because typically it's used as the common
negative return from the supply. (stuff used to be built on metal chassis,
nowadays it's a layer of copper on the PCB.)

Conceptually, it's like the difference between "ground" (the green or bare
wire) and "neutral" (the white wire) in house wiring.

They usually are connected together at one point (but only one!), but
that's not absolutely necessary, if it's totally isolated, double
insulated, all that schtuff.

Just FYI, the symbol for "earth ground" is usually:


|
|
-----
---
-

The chassis ground symbol is sometimes called "common", just to avoid
that confusion.

Hope This Helps!
Rich
 
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