If source = 6V, for 1 LED, you can use 150 ohms resister.作者: pcb6827 時間: 2009-10-2 17:02
请问怎样算出来的
V=IR I 有多大
谢谢作者: hardmankam 時間: 2009-10-2 17:32
Vsource = 6.0V
Vled = 3.0V (for bright white)
Iled = ~20mA or 0.02
so (Vsource - Vled) / (Iled) = (6-3)/0.02 = 150ohms.作者: pcb6827 時間: 2009-10-3 01:31
请问 Iled = ~20mA 是怎样出来的
谢谢作者: ryancmlam 時間: 2009-10-3 08:01
both Vled and Iled could be obtained from the data sheet of the LED manufacturer作者: pcb6827 時間: 2009-10-5 22:27
谢谢 C Hing