need a power supply

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Discussion in 'General Electronics Chat' started by astatin, Feb 24, 2008.

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Feb 24, 2008 #1

astatin Thread Starter New Member

Feb 24, 2008

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0

Hi there,

I need a power supply that runs two 5V and 160mA relay. Its efficiency must be %70-80. It is not important that it is smps or capacitive. It is my homework and i was said that this is for avert spending too much power when the tv or pc is off. Can you help me cause i can not find anything form net. Thanks.

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Feb 24, 2008 #2

hgmjr Retired Moderator

Jan 28, 2005

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Have you considered a wall-wart?

hgmjr

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Feb 27, 2008 #3

pradeeba Active Member

Feb 27, 2008

104

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can u give detailed specification about the power supply?

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Feb 29, 2008 #4

bloguetronica AAC Fanatic!

Apr 27, 2007

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hgmjr said: ↑

Have you considered a wall-wart?

hgmjr
Click to expand...

A wall-wart is not well regulated and might not have an efficiency of 80%.

I don't know why the requirement of a that high efficiency, when your application only requires an output power of 1.2W?

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