High efficiency led limiting resistor

14008205

The limiting resistor should add after the voltage-stabilizer circuit or?
can 2.3 ohm's resistance numbers neglect?

[ 本帖最後由 14008205 於 2009-10-30 21:57 編輯 ]

14008205

help

jwong852

No one understand what you want to ask.
Please state clearly what is your voltage source and what are the LED to be driven : current, typical voltage, qty .....