abrisham:
Thanks leo for your help...1).If i split that string in to 2*5 led the current will drop to 500mA and voltage to 4.8 v for each led is it correct?
2).If yes what happens to led with that extra current (200mA) and voltage about 1.5 v??
3). if one of 2 fails suddenly the other ones could be damage by heavy amp and volt... is there any way for protection?
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No. 24volt supply, two strings of five, two 300mA constant current boards, two Arduino PWM pins.
Those LEDs have a Vf (working voltage) of about 3.3volt each. -
300-350mA is all a 1watt LED can take.
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No. If one fails open circuit, the whole string will be off. If one is shorted, the constant current board will still send 300mA through the string.
Leo..