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PC PSU driving relay

  • Thread starter Dirk Bruere at NeoPax
  • Start date
D

Dirk Bruere at NeoPax

Jan 1, 1970
0
I am using the +12VDC from a PC PSU to switch mains using a relay ie
when the PC turns on mains power gets supplied to some amplifiers.

Do I need diode protection across the relay coil for when the PC PSU
switches off, or do such PSUs have such protection built in?
 
P

Phil Allison

Jan 1, 1970
0
"John Larkin"
Dirk Bruere at NeoPax


If the relay coil is connected directly to the 12 volt supply, you
don't need any other parts. There will be no flyback voltage.


** So this Dirk dude imagines he is an engineer ??

ROTFL !!



..... Phil
 
J

Jasen Betts

Jan 1, 1970
0
I am using the +12VDC from a PC PSU to switch mains using a relay ie
when the PC turns on mains power gets supplied to some amplifiers.

Do I need diode protection across the relay coil for when the PC PSU
switches off, or do such PSUs have such protection built in?

The PC powersupply has a bridge rectifier and some large capacitors on
the 12V output, if the capacitors don't suffice to provide a slow
enough voltage drop the rectifier will clamp the flyback peak voltage
to somthing smaller than -1V
 
D

Dirk Bruere at NeoPax

Jan 1, 1970
0
"John Larkin"


** So this Dirk dude imagines he is an engineer ??

ROTFL !!

Strangely enough, this is the first time I have ever used a mechanical
relay.
 
P

Phil Allison

Jan 1, 1970
0
"Dirk Bruere at NeoPax"
Phil said:
Strangely enough, this is the first time I have ever used a mechanical
relay.


** That supposed to be some kind of excuse ?

It ain't.
 
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Dirk Bruere at NeoPax

Jan 1, 1970
0
"Dirk Bruere at NeoPax"



** That supposed to be some kind of excuse ?

It ain't.
Based on your past record I assume your excuse is mental illness
 
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Phil Allison

Jan 1, 1970
0
Dirk Bruere at NeoPax = ****
Based on your past record I assume your excuse is mental illness

** Scum like you need a bullet in the head.
 
J

Jamie

Jan 1, 1970
0
Phil said:
Dirk Bruere at NeoPax = ****




** Scum like you need a bullet in the head.
Didn't they take the guns away from you guys? I can see
why.

I understand you people only want to be good samaritans
and clean up society but come on now, it appears to me, it
may create empty streets with attitudes like yours. I mean,
the worthless politicians won't have any brain dead voters
to keep them in office so they can live free off our backs.

Jamie
 
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