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Topic: RESOLVED What is "VSB" on a power supply? (Read 749 times) previous topic - next topic

JimboZA

Jan 06, 2013, 03:41 pm Last Edit: Jan 07, 2013, 06:04 pm by JimboZA Reason: 1
Hi gang,

The pic shows the label on a desktop pc power supply... I understand the DC outputs like 3.3, 5 (circled red) and 12V, but I've never noticed the +5VSB (circled purple) before.

Please can someone enlighten me as to what that is?

TIA,

Jim
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Your answer may already be here: https://forum.arduino.cc/index.php?topic=384198.0

johnwasser

I believe the "+5V" part means the same as it does elsewhere.  The "SB" part probably stands for "Stand-By" which would mean a 5V supply that is on even when the rest of the power supply is off.  It's used to maintain memory or power the power switch.
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JimboZA

Yep I got the +5V part too John  :)

But thanks, Stand By makes sense.


power the power switch.


Gotta love that idea.... sorry, can't switch the power on cos there's no power to power the switch.

Johannesburg hams call me: ZS6JMB on Highveld rep 145.7875 (-600 & 88.5 tone)
Dr Perry Cox: "Help me to help you, help me to help you...."
Your answer may already be here: https://forum.arduino.cc/index.php?topic=384198.0

MarkT

Well its used for wake-on-LAN etc, not just the power switch.  Some machines have permanently powered USB sockets
too IIRC.
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JimboZA

Confirmed from various Instructables like this one that the purple "SB" is indeed StandBy.
Johannesburg hams call me: ZS6JMB on Highveld rep 145.7875 (-600 & 88.5 tone)
Dr Perry Cox: "Help me to help you, help me to help you...."
Your answer may already be here: https://forum.arduino.cc/index.php?topic=384198.0

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