標題: Temperature control cooling fan [打印本頁]

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作者: tnovicet    時間: 2009-8-7 11:47     標題: Temperature control cooling fan

I am going to diy the temperature control cooling fan system based on the circuit below with some modification.

Posted on Everyday Practical Electronics, August 2008.


Test the circuit on a breadboard first.


Try to place all the components onto a graph paper.
To see connections are possible or not, minimize the jumper wires.
(Components Side)


Copper tracks that need to be cut, breaking  the connections.
(Soldering Side)


Cut out appropriate size of stripboard.


Using the handheld drill to break the tracks connection.


The PCB is now ready for soldering.











More photos and details will be posted later.

[ 本帖最後由 tnovicet 於 2009-8-11 12:30 編輯 ]

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作者: nothingzd    時間: 2009-8-7 11:53

有冇反轉既相睇下
似乎幾靚喎

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作者: tnovicet    時間: 2009-8-7 12:01     標題: 回覆 2# 的帖子

Not yet completed, just placeing the components

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作者: sony_eng    時間: 2009-8-7 12:05

CHing, very interesting PCB.  Where did you get it?

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作者: tnovicet    時間: 2009-8-7 12:08     標題: 回覆 4# 的帖子

Partially DIY

[ 本帖最後由 tnovicet 於 2009-8-9 01:31 編輯 ]

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作者: KaricKKL    時間: 2009-8-7 12:32

after u have complete show us a report ........

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作者: sony_eng    時間: 2009-8-8 20:14

Even DIY the PCB board and drill all holes??

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作者: 風之小文    時間: 2009-8-8 22:59

do u have more photo???
wahere is the relay in photo??

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作者: tnovicet    時間: 2009-8-9 01:25     標題: 回覆 7# 的帖子

Sorry, misleading you!
Partially DIY.

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作者: tnovicet    時間: 2009-8-9 01:28     標題: 回覆 8# 的帖子

I am directly controlling the cooling fan, relay is not needed.
More photos and details will be posted later.

[ 本帖最後由 tnovicet 於 2009-8-9 01:30 編輯 ]

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作者: jackli    時間: 2009-8-9 09:43

最神係塊 PCB....

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作者: avdaemon    時間: 2009-8-9 11:15

this one $10
http://item.taobao.com/auction/i ... 1a23.jhtml?cm_cat=0

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作者: 阿死    時間: 2009-8-15 21:24

原來塊pcb係咁用,

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作者: 風之小文    時間: 2009-8-16 02:03



that mean u use the fan to displace the coil of relay??

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作者: tnovicet    時間: 2009-8-16 16:04


'displace'?

I directly REplace the coil of relay with a cooling fan.

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作者: lucas    時間: 2009-8-16 23:45

did you want the fan to switch when temp. is hot enough, and switch off when temp. drop to some level? If you does, will the circuit a little bit complicated? Try to search something called "schmitt trigger", it should be more simple.

Have you ever think about change the fan speed instead of switch if off? I have done one on my home server.

BTW, where you found the stripboard? I have search it for long time but cannot found it. Can you tell me where you bought it?

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作者: 16F88    時間: 2009-8-17 00:03     標題: 回覆 15# 的帖子

看到師兄的制作圖非常高興，原來這裡有DIY，自己也把製作搬上網給大家賜教

圖片附件: [PCB_01] temperature_01.JPG (2009-8-17 00:03, 141.8 KB) / 下載次數 74
https://h2.hkepc.com/forum/attachment.php?aid=928315&k=2865575237f02e4d51d3d084db5e7199&t=1781784376&sid=1t3UH8eVIz

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作者: 16F88    時間: 2009-8-17 00:23     標題: 回覆 17# 的帖子

上載其他PCB

圖片附件: 複製 -temperature_02.JPG (2009-8-17 00:23, 97.1 KB) / 下載次數 54
https://h2.hkepc.com/forum/attachment.php?aid=928331&k=f6f4e34780db33a9b9c78ef964d74738&t=1781784376&sid=1t3UH8eVIz



圖片附件: capture_08172009_001812.jpg (2009-8-17 00:23, 25.14 KB) / 下載次數 66
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作者: avdaemon    時間: 2009-8-17 00:34     標題: 回覆 16# 的帖子

Great. Could you share some PWM fan control circuit for us?

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作者: tnovicet    時間: 2009-8-17 09:39



>>Have you ever think about change the fan speed instead of switch if off? I have done one on my home server.<<
No need to diy, you can buy a cooling fan that has a thermistor built inside.
The speed of the cooling fan is proportional to the temperature, i am using this one in my circuit.



I think this circuit is not complicated, it can be used in both switch on/off purpose.
1. switch on when temperature is high enough
or
2. switch on when termperature is low

And the the temperature and hysteresis can be adjusted easily, low cost thermistor is used.

The pcb can be found in Max (Hung Kwong Shopping Arcade,Tung Choi St.)

[ 本帖最後由 tnovicet 於 2009-8-17 09:57 編輯 ]

圖片附件: IMG_9449.JPG (2009-8-17 09:57, 34.84 KB) / 下載次數 74
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作者: tnovicet    時間: 2009-8-17 10:09

I had built this circuit long time ago to control the speed of 4 motors with diffenent speed. It is still working properly.
The main disadvantage of the circuit is high frequency noise.


圖片附件: 17-8-2009 10-03-05.jpg (2009-8-17 10:09, 61.24 KB) / 下載次數 84
https://h2.hkepc.com/forum/attachment.php?aid=928414&k=da116d12fd1458e943c21a1a214c7480&t=1781784376&sid=1t3UH8eVIz

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作者: avdaemon    時間: 2009-8-17 10:38     標題: 回覆 21# 的帖子

Thank you. what is the PWM frequency of this circuit? Could you see the LED flashing?

[ 本帖最後由 avdaemon 於 2009-8-17 10:38 編輯 ]

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作者: tnovicet    時間: 2009-8-17 10:45     標題: 回覆 22# 的帖子

Around 400Hz, the led is dimming.

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作者: avdaemon    時間: 2009-8-17 10:48

where is the noise come from? the Fan ?

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作者: tnovicet    時間: 2009-8-17 10:51     標題: 回覆 24# 的帖子

Yes, different speed -> different sound

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作者: avdaemon    時間: 2009-8-17 14:28



I tested this circuit also have noise <50% d.

after paralleled a 100uF to the Fan which smooth out the pulse, there is no noise now

[ 本帖最後由 avdaemon 於 2009-8-17 19:36 編輯 ]

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作者: 風之小文    時間: 2009-8-17 14:42



http://hk.dictionary.yahoo.com/search.html?q=1&s=displace&Submit=+%ACd%A6r+

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作者: lucas    時間: 2009-8-18 11:04

I know there is product in the market with thermal-speed control, but you can never control the target temp.

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作者: tnovicet    時間: 2009-8-18 11:17



Sorry, misleading you!
I am saying that in my configuration, the cooling fan is switched on when the temperature is high enough while the speed of it is proportional to the temperature, i do not control the speed of the cooling fan.