Author Topic: $50 power  (Read 779 times)

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Offline robakerTopic starter

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$50 power
« on: March 06, 2010, 04:17:03 AM »
the grounds of 4,8V and 9v are shared...
Is sharing the ground of 4.8V and 9V battery necessary  ?
If we seperate the grounds of both 4.8 and 9v also , is there any risk?
if not ,how does one know ?
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Offline chelmi

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Re: $50 power
« Reply #1 on: March 06, 2010, 08:54:20 AM »
they have to be connected. Voltage is not an absolute value, you need a common ground.
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Offline robakerTopic starter

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Re: $50 power
« Reply #2 on: March 07, 2010, 02:03:16 AM »
--Voltage is not an absolute value, you need a common ground.--
?? plz explain this line...
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Offline SmAsH

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Re: $50 power
« Reply #3 on: March 07, 2010, 02:13:46 AM »
I don't understand the first part but, keep the grounds connected, you need this.
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Howdy

Offline cyberfish

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Re: $50 power
« Reply #4 on: March 07, 2010, 02:39:43 AM »
Voltage = potential DIFFERENCE - difference in potential energy between 2 points.

Without a common ground, the 2 differences won't do much. You will have essentially 2 separate circuits.

In short, they have to be connected together.
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