PSU Connection questions

[DevArmaya]

Ok, just have a couple of questions that maybe someone can answer for me:

 

A little background first, I have some PC parts laying around and decided I wanted to make an LCD side panel for poops n giggles.  I have all the parts (I think) I need already but before I get started I wanted to ask for some info.

 

1. I need 12v/4a to connect to the LCD mainboard, is there a PSU connection (4pin/12pin etc) that will output that without a stepdown/up?  Eg: Take off the cable connector, slap on a 12v Barrel head adapter and off I go.

 

2. Is there a standardize Volt/Amp output for PSU's Connectors or is it all based off PSU Size (Wattage)?

 

Will most likely have more questions as the answers come in!

 

Thanks for your assistance.

[minibois]

5 minutes ago, DevArmaya said:

1. I need 12v/4a to connect to the LCD mainboard, is there a PSU connection (4pin/12pin etc) that will output that without a stepdown/up?  Eg: Take off the cable connector, slap on a 12v Barrel head adapter and off I go.

This one I don't know and I am not going to be able to answer

There is ground and +12v on many connectors.. If that helps.

5 minutes ago, DevArmaya said:

2. Is there a standardize Volt/Amp output for PSU's Connectors or is it all based off PSU Size (Wattage)?

There are standards. Like 6 pin PCIE does 75W, 6+2 = 150W. 4 pin EPS = 150W and 4+4 pin EPS = 384W.

A higher wattage PSU usually just includes more connections.

[DevArmaya]

So, dual PCIE 6 pin = 12v/4a?  Splicing those into one connection would work?

[DevArmaya]

Anyone else have any input on this?

[Spotty]

4 hours ago, DevArmaya said:

I need 12v/4a to connect to the LCD mainboard, is there a PSU connection (4pin/12pin etc) that will output that without a stepdown/up?  Eg: Take off the cable connector, slap on a 12v Barrel head adapter and off I go.

All of the connectors on a power supply have at least one 12v wire.

If the cables are colour coded then 12v is yellow. Otherwise check the pinout for the connector or better yet use a multimeter.

 

4 hours ago, DevArmaya said:

Is there a standardize Volt/Amp output for PSU's Connectors or is it all based off PSU Size (Wattage)?

Voltage is standard. PSUs output 12v, 5v, 3.3v. some PSUs are 12v only. You can view the output voltages on the label of the PSU.

The voltage should remain constant. It's the current which changes depending on the load of whatever is drawing power. 

[DevArmaya]

Yeah, don't have a multi-meter (Anymore, it died ).  Looks like I will have to pick one up, will be handy to have one again.

 

Does the amperage change on the 12v wires or is it constant as well @Spotty?

[Guest]

7 minutes ago, DevArmaya said:

Yeah, don't have a multi-meter (Anymore, it died ).  Looks like I will have to pick one up, will be handy to have one again.

 

Does the amperage change on the 12v wires or is it constant as well @Spotty?

Power supplies supply the power required of them.

 

In other words, they don't supply a constant output.  If the load is 4A, the load is 4A.  You just have to make sure the circuit can handle at least 4A.

 

[DevArmaya]

Ahhhhh ok, thats the part I was unsure of.  I didnt know if it was constant (Based on board req) or if was just all or nothing.

[DevArmaya]

@jonnyGURU So any 12v connection will supply 4amp if the board asks for it, I mean if I understand what you are saying correctly.

[Guest]

Yes.

[DevArmaya]

@jonnyGURU Thanks a lot!