Comments on: Dollar Store Dissection: LED Color Matrix Mini Fan http://www.gigamegablog.com/2009/01/19/dollar-store-dissection-led-color-matrix-mini-fan/ Powered by GigaMegaWatts Thu, 09 Feb 2012 02:01:04 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Dan http://www.gigamegablog.com/2009/01/19/dollar-store-dissection-led-color-matrix-mini-fan/#comment-59 Dan Sun, 28 Jun 2009 21:42:05 +0000 http://gigamegatech.com/2009/01/19/dollar-store-dissection-led-color-matrix-mini-fan/#comment-59 Hi, Yes, I understand what you mean - how can you connect a rapidly spinning circuit board to a power source? I didn't cover that in my blog post because I couldn't figure out the answer. Your English is much better than my knowledge of electronics! In the bottom photo of my post, I was just lighting the LED strip by itself, without being connected to the motor. So, the red and black wires you see in that photo go directly to the power source of 3 AA batteries. In the fan, there originally weren't any wires at going into the circuit board. I do have a few other photos that show how the circuit board was originally connected to the motor. In <a href="http://gigamegatech.com/docs/CircuitBoardConnectedToMotor.JPG" rel="nofollow">this photo</a> you can see the circuit board mounted on the motor spindle. In <a href="http://gigamegatech.com/docs/MetalStripInFan.JPG" rel="nofollow">this photo</a> you see a metal strip that is, I think, the power source for the circuit board. Here is the <a href="http://gigamegatech.com/docs/BackOfCircuitBoardInFan.JPG" rel="nofollow">back of the circuit board</a>. If the circuit board is being powered by that metal strip, perhaps it is by physical contact with the strip as it spins. Here is <a href="http://gigamegatech.com/docs/MotorInFan.JPG" rel="nofollow">a photo</a> that shows how the metal strip is connected to the motor - the black wire is connected to the metal strip. If you can tell from these photos how the circuit board was being powered, please let me know! Dan. Dan. Hi,

Yes, I understand what you mean – how can you connect a rapidly spinning circuit board to a power source? I didn’t cover that in my blog post because I couldn’t figure out the answer. Your English is much better than my knowledge of electronics!

In the bottom photo of my post, I was just lighting the LED strip by itself, without being connected to the motor. So, the red and black wires you see in that photo go directly to the power source of 3 AA batteries. In the fan, there originally weren’t any wires at going into the circuit board.

I do have a few other photos that show how the circuit board was originally connected to the motor. In this photo you can see the circuit board mounted on the motor spindle. In this photo you see a metal strip that is, I think, the power source for the circuit board. Here is the back of the circuit board. If the circuit board is being powered by that metal strip, perhaps it is by physical contact with the strip as it spins. Here is a photo that shows how the metal strip is connected to the motor – the black wire is connected to the metal strip.

If you can tell from these photos how the circuit board was being powered, please let me know!

Dan.

Dan.

]]> By: hoangdien http://www.gigamegablog.com/2009/01/19/dollar-store-dissection-led-color-matrix-mini-fan/#comment-58 hoangdien Sun, 28 Jun 2009 13:59:25 +0000 http://gigamegatech.com/2009/01/19/dollar-store-dissection-led-color-matrix-mini-fan/#comment-58 can u explain how can we supply power for the circular circuit while the fan is spinning. In the figure shows the bottom of the circuit, u say that all four pins are connected to ground, therefore where is the positive pole. I cannot find out a way to connect a wire to the circuit, because when the circuit is spinning, the wire will be twisted. I am a Vietnamese, forgive me if my English was too bad :) can u explain how can we supply power for the circular circuit while the fan is spinning. In the figure shows the bottom of the circuit, u say that all four pins are connected to ground, therefore where is the positive pole. I cannot find out a way to connect a wire to the circuit, because when the circuit is spinning, the wire will be twisted. I am a Vietnamese, forgive me if my English was too bad :)

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