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Old 01-17-2022, 05:29 AM   #24
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Join Date: Jul 2011
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Default Re: LED Array Schematic Check?

Depending on how the PWM signal is generated it might make a difference but I am not sure exactly because when I had to do this for an industrial application the PWM was generated by a micro controller and with type of signal this is very noisy environment and putting a small value capacitor on the output cleaned it up enough that the device worked correctly this is what I am going by but when I look at the volt meter with out the capacitor on the output you could see the voltage fluctuation with your eyes but after putting the capacitor on the output it smooth out the voltage fluctuation and was less notable
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *

These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board

All of these had CAPs POOF
All of the mosfet that are taken out by bad caps

Last edited by sam_sam_sam; 01-17-2022 at 05:32 AM..
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