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Hi All,
I have facing a resistor problem, please help me.
I have 1 board connect the resistor 200ohm 2W to between rectifier gound & signal gound. I found that the resistor open. But I have another board the resistor 200ohm 2W change to 2X resistor 100ohm 1W connect in series no found this...
Hi all,
I have design a power board AC to DC as using non-isolated topology.
Now I found that my inductor the temperature very higher, more than 100 degree celcium. The operating spec of the inductor just go to 85 degree celcium only.
Have any idea to reduce the temperature of the inductor...
how to solve current problems
I have 1 Power supply output 700mA
and 2 string LED board
Now I connector power supply to 2 string LED board.
Each string 350mA.
My problem :
1. Cannot get the same current (350mA) for each LED board.
- I have add 1 resistor 10 ohm to each LED board...
resistor connection
Who can let me know what is the different about below question.
I have connected 9 LED in series, but I need to add a resistor to
control the current.
As I know the resistor should be add after the LED cathod,
that mean on negative on my power supply.
But I saw some...
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