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???
03/01/12 06:55
Modified:
  03/01/12 07:04

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#186313 - Answers + need some explantion
Responding to: ???'s previous message
I guess you have found this schematic on the net somewhere.

Yes.

Why not create a real solution and use chains of maybe 80V instead? How fast do you need to flash them - can't you use a current-controlled driver?

I'm open to good ideas, can you explain me this?
I thought in using direct AC supplying because I dont want to spend LOTS with a supply enough to light several LEDs... 3 series of these LEDs are already more than 1 amp.
LED quantity here is not critic, (like over 20 LEDs is ok for me)
I dont know exactly the flash frequency, it will be a lightning device like a party strobe.
Can you explain me the current-controlled driver?
I know constant current drivers, but for low voltage systems, not for high voltage like here.

A. What is a cost of one (1) accident that burns 50% of your LEDs?
B. What is the cost if someone manages to touch the circuit and comes after you for compensation?
C. What is the cost if some inspector sees this design and orders it immediately removed?

A. like 20USD
B. I will protect with something like a glass or plexiglass.
C. I will use at home, I believe no inspector here, if some inspector comes then I really dont know.

Thank you very much.

EDIT: PS: I have read about varistor + fuse for protection... kinda "medieval" but could help?

List of 27 messages in thread
TopicAuthorDate
AC Powered LEDs + strobe            01/01/70 00:00      
   Isolated Switch            01/01/70 00:00      
      Switching            01/01/70 00:00      
   Some basics            01/01/70 00:00      
      Not a good design - and expensive            01/01/70 00:00      
         Answers + need some explantion            01/01/70 00:00      
      Cap voltage            01/01/70 00:00      
         More than 280V            01/01/70 00:00      
            Measurement            01/01/70 00:00      
               Measurement correct            01/01/70 00:00      
   two caps polarity reversed on DC!! ?            01/01/70 00:00      
      More common long time ago            01/01/70 00:00      
         I was around then            01/01/70 00:00      
            Some polarized capacitors survives AC but not reversed DC            01/01/70 00:00      
               POOOOOOOOOF            01/01/70 00:00      
                  Yes, very likely a failure            01/01/70 00:00      
                     that need bold face            01/01/70 00:00      
            Back to back connection...            01/01/70 00:00      
   And another thing...            01/01/70 00:00      
      Pseudo-CC with resistor requires much % V over resistor            01/01/70 00:00      
      chip            01/01/70 00:00      
         one of these            01/01/70 00:00      
         Chips            01/01/70 00:00      
   PC PSU            01/01/70 00:00      
      Definitely better with lower voltage design            01/01/70 00:00      
         PSU            01/01/70 00:00      
            Some bricks can inform about rating            01/01/70 00:00      

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