Thread View: sg.comp.hardware.ibmpc
9 messages
9 total messages
Started by Goois
Sun, 20 Dec 1998 00:00
Using AC fan in casing
Author: Goois
Date: Sun, 20 Dec 1998 00:00
Date: Sun, 20 Dec 1998 00:00
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Hi I am thinking of getting a large AC fan for my casing. It is about 12cm by 12cm. Instead of a 12v DC supply from the casing, it is powered by a two-pin plug connected to the normal 230v power point. My question is, since it is an AC fan, will there be the issue of emf from the fan and its power cord? I am worry that the emf will interfere with the other devices inside the casing. I have tried the 8case fan (0.22A, 8cm at $35) from Cybermind, but I still found the 12 cm fan cooler. Better still if there exists a 12cm DC fan. Pls tell me where I can get this fan in Sim Lim(or else where). PLS advice, rgds.
Re: Using AC fan in casing
Author: Zodomi
Date: Sat, 19 Dec 1998 00:00
Date: Sat, 19 Dec 1998 00:00
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On Sun, 20 Dec 1998 01:11:00 +0800, Goois@mbox5.singnet.com.sg wrote: >Hi > >I am thinking of getting a large AC fan for my casing. It is about 12cm >by 12cm. Instead of a 12v DC supply from the casing, it is powered by a >two-pin plug connected to the normal 230v power point. > >My question is, since it is an AC fan, will there be the issue of emf >from the fan and its power cord? I am worry that the emf will interfere >with the other devices inside the casing. > >I have tried the 8case fan (0.22A, 8cm at $35) from Cybermind, but I >still found the 12 cm fan cooler. > >Better still if there exists a 12cm DC fan. Pls tell me where I can get >this fan in Sim Lim(or else where). > >PLS advice, rgds. > Sim Lim Tower !
Re: Using AC fan in casing
Author: Dr G H Tan
Date: Sun, 20 Dec 1998 00:00
Date: Sun, 20 Dec 1998 00:00
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Goois@mbox5.singnet.com.sg wrote in message <367BDE24.CCA3F4AC@mbox5.singnet.com.sg>... >My question is, since it is an AC fan, will there be the issue of emf >from the fan and its power cord? I am worry that the emf will interfere >with the other devices inside the casing. No. Usually AC motors do not give interference since you are not using speed control chopper drives. DC motors with brush will give interferece But even DC motors have brushless type now >I have tried the 8case fan (0.22A, 8cm at $35) from Cybermind, but I >still found the 12 cm fan cooler. > >Better still if there exists a 12cm DC fan. Pls tell me where I can get >this fan in Sim Lim(or else where). Try Sim Lim Tower not SIm Lim Square, there are shops on 3rd and Basement which sells these stuff They cost only $ 5 ~ $10 ... Even that I consider expensive. Dot pay $35 for a fan unless you want to chat up the sales girl in mini skirt The cost price of these type of fans (consumer product) is ~ $ 1 to $2 You see the mark up by the distribution chain. But that is how business is run -- Dr G H Tan (Hard Core Engineer) SysEng (S) Pte Ltd Company Activities at www.singnet.com.sg/~syseng (takes ~ 5 minutes ! have a break while loading ) Born into the Analog world
Re: Using AC fan in casing
Author: Goois
Date: Sun, 20 Dec 1998 00:00
Date: Sun, 20 Dec 1998 00:00
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Cool! Thanx for your advice. Merry Xmas Gary Dr G H Tan wrote: Goois@mbox5.singnet.com.sg wrote in message <367BDE24.CCA3F4AC@mbox5.singnet.com.sg>... >My question is, since it is an AC fan, will there be the issue of emf >from the fan and its power cord? I am worry that the emf will interfere >with the other devices inside the casing. No. Usually AC motors do not give interference since you are not using speed control chopper drives. DC motors with brush will give interferece But even DC motors have brushless type now >I have tried the 8case fan (0.22A, 8cm at $35) from Cybermind, but I >still found the 12 cm fan cooler. > >Better still if there exists a 12cm DC fan. Pls tell me where I can get >this fan in Sim Lim(or else where). Try Sim Lim Tower not SIm Lim Square, there are shops on 3rd and Basement which sells these stuff They cost only $ 5 ~ $10 ... Even that I consider expensive. Dot pay $35 for a fan unless you want to chat up the sales girl in mini skirt The cost price of these type of fans (consumer product) is ~ $ 1 to $2 You see the mark up by the distribution chain. But that is how business is run -- Dr G H Tan (Hard Core Engineer) SysEng (S) Pte Ltd Company Activities at www.singnet.com.sg/~syseng (takes ~ 5 minutes ! have a break while loading ) Born into the Analog world
Re: Using AC fan in casing
Author: Zodomi
Date: Sun, 20 Dec 1998 00:00
Date: Sun, 20 Dec 1998 00:00
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On Sun, 20 Dec 1998 07:08:21 +0800, "Dr G H Tan" <syseng@singnet.com.sg> wrote: >They cost only $ 5 ~ $10 ... Even that I consider expensive. >Dot pay $35 for a fan unless you want to chat up the sales girl in mini >skirt > Cantik or not Doc ?
Re: Using AC fan in casing
Author: Jeff Jonas
Date: Mon, 21 Dec 1998 00:00
Date: Mon, 21 Dec 1998 00:00
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>>My question is, since it is an AC fan, will there be the issue of emf >>from the fan and its power cord? I am worry that the emf will interfere >>with the other devices inside the casing. >No. Usually AC motors do not give interference since you are not using >speed control chopper drives. Ah, thank you for noting that caveat that I forgot. I'm unsure what is gained by thermostatically controller fans since in my case, the fan makes awful noise at the lower speeds! I fear it's contributing to the bearing wear by varying the speed instead of just spinning at a constant speed. And what's the worst that will happen: my computer will be cooled too much? >DC motors with brush will give interferece >But even DC motors have brushless type now I daresay that all the DC cooling fans I've seen or taken apart were brushless since brush commutator motors are loud with the buzzing and are used in high power situations such as hair dryers. Apparently the brushless DC motor controllers are so cheap there's no excuse to use anything else. -- Jeffrey Jonas jeffj@panix(dot)com The original Dr. JCL and Mr .hide
Re: Using AC fan in casing
Author: Hong Chin Siong (��i��)
Date: Sat, 26 Dec 1998 00:00
Date: Sat, 26 Dec 1998 00:00
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I have consider to change the power supply fan to a 230V fan (not the 12V conventional), not know if anyone have tried that and will that be OK??? Dr G H Tan wrote: > The cost price of these type of fans (consumer product) is ~ $ 1 to $2 > You see the mark up by the distribution chain. But that is how business is > run > If you want to earn other people's money, why you worry your money be earned?? This world is a cycle, you cannot gain and never give. -- CSHong ��i�� Singapore �s�[�Y 1st Email: h3684984@singnet.com.sg �q�l 2nd Email: chinsiong@netscape.net �q�l 3rd Email: chinsiong@yahoo.com �q�l 1st Homepage: http://web.singnet.com.sg/~h3684984/index.htm ���� 2nd Homepage: http://www.geocities.com/Tokyo/Flats/2230/index.html ����
Re: Using AC fan in casing
Author: mrdata
Date: Sat, 26 Dec 1998 00:00
Date: Sat, 26 Dec 1998 00:00
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A electic oven is on 220V/440V, a large air compressor is on 220V, I think you are talking about changing your power supply to 230/235 Watt? If so, what is your current rating and what kind of peripherals do you currently have? You might post your future ideas as well. regards mrdata =========== :^) Hong Chin Siong (��i��) wrote: > I have consider to change the power supply fan to a 230V fan (not the 12V > conventional), not know if anyone have tried that and will that be OK??? > > Dr G H Tan wrote: > > > The cost price of these type of fans (consumer product) is ~ $ 1 to $2 > > You see the mark up by the distribution chain. But that is how business is > > run > > > > If you want to earn other people's money, why you worry your money be earned?? > This world is a cycle, you cannot gain and never give. > -- > CSHong ��i�� > Singapore �s�[�Y > 1st Email: h3684984@singnet.com.sg �q�l > 2nd Email: chinsiong@netscape.net �q�l > 3rd Email: chinsiong@yahoo.com �q�l > 1st Homepage: http://web.singnet.com.sg/~h3684984/index.htm ���� > 2nd Homepage: http://www.geocities.com/Tokyo/Flats/2230/index.html ����
Re: Using AC fan in casing
Author: Zodomi
Date: Sun, 27 Dec 1998 00:00
Date: Sun, 27 Dec 1998 00:00
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On Sat, 26 Dec 1998 10:10:17 -0500, mrdata <mrdata_NOSPAM_@aiusa.com> wrote: >A electic oven is on 220V/440V, a large air compressor is on 220V, I think >you are talking about changing your power supply to 230/235 Watt? >If so, what is your current rating and what kind of peripherals do you >currently have? You might post your future ideas as well. I think his idea is to use an AC fan with external power source and not from the PSU. I don't know whether an AC fan is too powerful for a PC or not !!!
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