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Calculating load requirements

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danny_galaga:

--- Quote from: SavannahLion on January 17, 2011, 03:20:23 am ---
--- Quote from: danny_galaga on January 17, 2011, 02:49:48 am ---
Keep adding to it until something goes pop. Then you know you should have had one less than that  ;D

--- End quote ---

 ??? ??? ???

--- End quote ---

I stand by my assertion

MonMotha:
10mA seems like an AWFULLY low rating for a 5V line on a PC supply.  That's only 50mW (0.05W).  Most PC supplies can handle at least half an amp (2.5W) on their 5V standby (always on) output and MUCH higher (often north of 20A) on their main 5V outputs.

You don't need to measure it in the final installation as long as your supply conditions are roughly the same (i.e. 5V and not bouncing off any current limiters).  If you post the circuit, I can help you analyze it to figure out what it "should" be.

SavannahLion:

--- Quote from: MonMotha on January 17, 2011, 06:44:05 am ---10mA seems like an AWFULLY low rating for a 5V line on a PC supply.  That's only 50mW (0.05W).  Most PC supplies can handle at least half an amp (2.5W) on their 5V standby (always on) output and MUCH higher (often north of 20A) on their main 5V outputs.

--- End quote ---

Yeah, I want to draw off of the PC standby line.


--- Quote ---You don't need to measure it in the final installation as long as your supply conditions are roughly the same (i.e. 5V and not bouncing off any current limiters).  If you post the circuit, I can help you analyze it to figure out what it "should" be.

--- End quote ---

Err...I'm a little embarrassed to put up an untested circuit. Right now, the only "schematic" I have is the TINA simulation file. Some of the graphics and IC pinouts are a little weird. I can take a screenshot of the circuit from TINA though.

MonMotha:
Looks like I don't have TINA on here (amazing...), so a screenshot will work fine.

As for the ratings of the 5VSB line, check your PSU.  Figure your motherboard draws ~200-300mA or more if you have USB charging during sleep enabled.

SavannahLion:
Yeah, my version of TINA is pretty old 6.0 I think. If this laptop craps out, I'm not even sure if I can reinstall. Hell, I don't know if I ever can reinstall. I have no idea where the installation files are.

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