Author Topic: Power supply wine when running led contoller  (Read 997 times)

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Offline shiftline

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Power supply wine when running led contoller
« on: May 19, 2016, 06:16:13 pm »
I bought this susay 100w 12v 8.5a power supply for my DIY LED light
It powers a TV420 contoller which outputs to the different led channels

Everything works except for this annoy whine outputted from the power supply


How can I fix this?!



 

Offline Wirehead

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Re: Power supply wine when running led contoller
« Reply #1 on: May 19, 2016, 06:21:31 pm »
Can you put a capacitor on the input V+ V- of the controller? Probably the PWM'ing is causing spikes on the supply rail.
"to remain static is to lose ground"
 

Offline shiftline

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Re: Power supply wine when running led contoller
« Reply #2 on: May 19, 2016, 07:49:17 pm »
I will try it.  Do you have a recommendation of what size to use?
 

Offline ali6x944

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Re: Power supply wine when running led contoller
« Reply #3 on: May 19, 2016, 08:54:44 pm »
How much current dose the led driver draws from the supply , because some supplies will make a high pitch wine when high current is drown due to the fact that it shift in frequency and the increased duty cycle which is some times in hearing rang.
 

Offline shiftline

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Re: Power supply wine when running led contoller
« Reply #4 on: June 20, 2016, 06:00:05 am »
I ended up finding a different supply but I'm still curious to test this to find out the cause. I'll put a meter on it later and see what is drawing
 


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