Brother ice 1234,
some more question he he :
1. can I join 2 LEDs in a series and use 1K resistor ? Actually I think 2 LED will be enough.
2. should I connect the (-) of the backlite circuit to the PCB (-) and connect the (+) to the swith ( on ) position ?
3. do I need to remove the silver paper from the LCD and then put the 2MM 透明膠 underneath ?
thanks for your help
原帖由 rk2 於 2007-9-15 10:30 PM 發表
1. can I join 2 LEDs in a series and use 1K resistor ? Actually I think 2 LED will be enough.
我用2.2k因為唔想佢咁光....你個方法都得ok...不過可能你用4v led 時會好暗......如果想用盡d個rating,可以自己度
led 個 internal resistance 同 forward voltage....再自己計出最啱既電阻 combination..
方法係用4粒2aa電加一粒220ohm 電阻串聯一粒你要用既led ....drop 低d data再計返led 個 internal resistance