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وبلاگ علمی آموزشی شرکت پارس شعاع توس (LED) - درایور LED با 555 تایمر

در این وبلاگ مطالب آموزشی مربوط به لامپ های LED و چراغ های روشنایی قرار داده شده است. این وبلاگ یک وبلاگ صرفا آموزشی می باشد که قصد دارد اطلاعات کاربران را در مورد لامپ های LED و چراغ های روشنایی افزایش دهد. در این وبلاگ مطالبی از قبیل انواع لامپ های LED و چراغ های روشنایی، اجزاء مختلف ، چراغ های روشنایی نحوه کار قسمت های مختلف ، نحوه ساخت و تکنولوژی ساخت در شرکت های مختلف و استاندار های مربوط به این لامپ ها و چراغ های روشنایی قرار داده شده است.

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درایور LED با 555 تایمر

یکشنبه 1 اردیبهشت 1392   04:18 ب.ظ


نوع مطلب : LED ال ای دی ،چراغ روشنایی LED ،

این مدار که برای خودم جالب بود و تستش هم کردم براتون میذارم . این مدار در ابتدا که راه اندازی می شود دارای پهنای پالس حداکثر 85 % می باشد . که بصورت یک نوسان ساز ساخته شده است. با تغیر جریان در LED ها مقدار جریان در مقاومت R3 تغییر می کند و جریان بیس را تحریک می کند . پایه ی 5 آی سی 555 به کنترل ولتاژ نامیده شده است که با تغییر در ولتاژ این پایه نسبت 2/3Vcc بهم ریخته و باعث می شود که نسبت روش به خاموش شدن تغییر کند . البته این تغییر تا مینیمم 50 % امکان پذیر می باشد .

555

این مدار یک مبدل بوست می باشد که مورد تست قرار گرفته و بخوبی کار می کند . نرم افزار محاسبات Timer 555  را از دانلود کنید .


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‘Why Andrew? You're so handsome. I'd never reject you ',
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‘Oh, I do not know. Everything happens for good reason right.
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"So, would you mind if I kissed you today?' he stated as I recieve better him and kiss him.

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