jerrychan0610 | MY SPACE Read all of the posts by jerrychan0610 on MY SPACE ... LED電阻值裝配計算式 (電源電壓V-LED切入電壓V)÷限流電流A=電阻值Ω 範例 使用變壓器.輸出為DC12V的電源下 串聯3顆超白光LED (如下圖) 電源電壓:12V LED切入電壓:3.2V*3=9.6V 限流電流 ...