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| Thread ID: 69280 | 2006-05-27 22:29:00 | Fan Cool Down Timer. | The_End_Of_Reality (334) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 458359 | 2006-05-28 16:20:00 | Why hasn't anybody thought of using their UPS for alternate power during the cool-down period? Should be simple to create a timer or voltage monitor for a minimum voltage from it to shut things down after a while . Since the UPS doesn't use the output power from the PSU, then there's no parasitic load on it trying to recover after a discharge of some storage device like batteries or capacitors . I also believe that all AMD processors would like the after cooling effect when you shut down . After all, the fans just quit and the heat is still there . I was using liquid cooling and the coolant got considerably warmer after shut down than when the tower was actually running and protecting itself . However: I don't think it's necessary to run all the fans after shut down unless you just want it to sound "cool" to observers; the CPU is the only real needy one here . |
SurferJoe46 (51) | ||
| 458360 | 2006-05-28 20:27:00 | I was using liquid cooling and the coolant got considerably warmer after shut down than when the tower was actually running and protecting itself . However: I don't think it's necessary to run all the fans after shut down unless you just want it to sound "cool" to observers; the CPU is the only real needy one here . Once the CPU shuts down it stops producing heat so it's not going to get hotter . If the coolant or air in the case gets warm that's not likely to be a problem . I would guess that allowing the CPU to return to ambient temp gradually rather than quickly may actually be better, less stress on all the connections etc . |
PaulD (232) | ||
| 458361 | 2006-05-29 00:55:00 | i think what sufer joe was on about, the cpu may not make anymore heat but the heatsink still contains heat and with no airflow it will actually continue to heat the cpu. much like a car motor, turn the motor of and the temp in the motor actually goes up. in a lot of cars the raditor fan will continue to run even after the motor has been switched off. however its not really a problem to the pc unless your cooling system is being pushed to the max all the time. it quite good to turn the heat source off and leave the fans running to get rid of the leftover heat. |
tweak'e (69) | ||
| 458362 | 2006-05-29 03:42:00 | i think what sufer joe was on about, the cpu may not make anymore heat but the heatsink still contains heat and with no airflow it will actually continue to heat the cpu. much like a car motor, turn the motor of and the temp in the motor actually goes up. in a lot of cars the raditor fan will continue to run even after the motor has been switched off. however its not really a problem to the pc unless your cooling system is being pushed to the max all the time. it quite good to turn the heat source off and leave the fans running to get rid of the leftover heat. :thumbs: ...Yup! That's it...I think the residual heat MAY be a factor...and if you o/c, then maybe it's a good idea to run a minimal set of processes for a few minutes 'till things cool down a bit b4 shutdown. I still like the idea of using the UPS for the power for this project though. |
SurferJoe46 (51) | ||
| 458363 | 2006-05-29 04:12:00 | Why hasn't anybody thought of using their UPS for alternate power during the cool-down period? Should be simple to create a timer or voltage monitor for a minimum voltage from it to shut things down after a while . Since the UPS doesn't use the output power from the PSU, then there's no parasitic load on it trying to recover after a discharge of some storage device like batteries or capacitors . I also believe that all AMD processors would like the after cooling effect when you shut down . After all, the fans just quit and the heat is still there . I was using liquid cooling and the coolant got considerably warmer after shut down than when the tower was actually running and protecting itself . However: I don't think it's necessary to run all the fans after shut down unless you just want it to sound "cool" to observers; the CPU is the only real needy one here . Great idea SurferJoe, using the UPS for alternate power supply and certainly one I will investigate . We are trying to make this project as universal as possible so others can use it . Some people may not have a UPS . My UPS continues to pump out 240VAC when you shutdown the computer . This will only change if the wall switch is turned off or if we have a power cut . This not what The End Of Reality wanted . If you could draw a circuit diagram and send me a private message on how to do what you suggest, I'm only too happy to learn . My first concern is the current draw of ten fans at 200-300ma each,what-ever the final power supply . Also the audible noise from them could be a problem . Might sound like a Lear jet taking off!! I think this project is a great idea, (that's why I got involved), but I personally have no use for it . Any other suggestions would be very welcome . BURNZEE |
Burnzee (6950) | ||
| 458364 | 2006-05-29 04:14:00 | Joe, I don't have a UPS, so that idea is out, but it looks to be an external PSU will be needed fo this to work. Yes, this thing is OCed to with in 50Mhz of where it is not stable :D EDIT, what size UPS would you think to be good? ie, 350VA, 700VA etc etc... |
The_End_Of_Reality (334) | ||
| 458365 | 2006-05-29 04:19:00 | Joe, I don't have a UPS, so that idea is out, but it looks to be an external PSU will be needed fo this to work. Yes, this thing is OCed to with in 50Mhz of where it is not stable :D EDIT, what size UPS would you think to be good? ie, 350VA, 700VA etc etc... I don't think the size of the UPS is all that important here, as you just want to use it to drive a few fans for a while...not like you would be using it to keep the fires burning in a game site....right? |
SurferJoe46 (51) | ||
| 458366 | 2006-05-29 04:26:00 | Oh, ok, I was also thinking of maybe connecting the whole rig up to it, not just the fans, but if it will cost too much then I will forget it... Burnzee - I am not too worried about the loudness of the fans during cool down time, as they sit here on full al the time, I would like a var resistor to turn them down, which would get bypassed with the CDT |
The_End_Of_Reality (334) | ||
| 458367 | 2006-05-29 04:37:00 | Oh, ok, I was also thinking of maybe connecting the whole rig up to it, not just the fans, but if it will cost too much then I will forget it . . . Burnzee - I am not too worried about the loudness of the fans during cool down time, as they sit here on full al the time, I would like a var resistor to turn them down, which would get bypassed with the CDT I think using another PSU would not be a good idea for a couple of reasons: 1) you need to use the fans speed monitor and the temp sensor working in conjunction with each other getting speeds and temps data from the mobo . . . right? 2) you need to use the external psu to run the fan(s) in after-run mode . . . right? How're you gonna get them to co-exist on the same rails without some sort of interplay and cross-purposes? Breadboarding a circuit might be a poor idea . Isolation diodes come to mind, but we are not dealing with just sloppy guesswork . . the voltages on the rails is very clean, purified and can cause all sorts of troubles with switching, diode gating and thru-leakage and then there's the danger of smoking the whole thing anyway . I'd just add an aux fan over the CPU and maybe another over the vid card and another 4-incher in the side of the case to send in some fresh air powered by the UPS and a timer and hope for the best . Isolation and total seperation of the dual power supplies seems safest as does duality in the fans . . . or buy an Enermax PSU with after-run already installed . |
SurferJoe46 (51) | ||
| 458368 | 2006-05-29 04:47:00 | 1. yes, what I have an idea, connect onto the CPU fan, ie add in my own connection (diode as well) and that will allow the MOBO to still get the sensor and voltage through. (I can draw a picture to explain if you want :thumbs: ) 2. yes there will be need of an external PSU, Burnzee came up with the idea of monitoring the PC PSU, and what that went off our circuit starts up using the external PSU. |
The_End_Of_Reality (334) | ||
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