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  1. [31]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
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    I attached a pic showing three different dave lawton circuit schematics. My question is, which one to use!!! Each one has minor differences from the other two. I am still building my skill in circuit construction, so I don't want to have to guess if the circuit I am trying to build even works. Any help on which circuit (which D14.pdf version) to use would be great. I know there was another posting on this, but no one has posted a pic showing the three different versions. Thanks.


    D14 Version Comparison.JPG De******ion: These schematics are of the following dates: June 2nd, June 10th, and December 24th Filesize: 181.98 KB Viewed: 159 Time(s)

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  2. [32]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
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    w if there is anything I can inprove..
    Thanks..


    b2_spice_dave_lawton_circuit_picture_293.JPG De******ion:
    Filesize: 198.73 KB Viewed: 668 Time(s)




    Dave Lawton PWM B2 spice v5 with VIC.txt De******ion:

    Download Filename: Dave Lawton PWM B2 spice v5 with VIC.txt Filesize: 280.28 KB Downloaded: 88 Time(s)

    total uninstall installation.txt De******ion:

    Download Filename: total uninstall installation.txt Filesize: 822.6 KB Downloaded: 68 Time(s)


    Last edited by eclipsed78 on Sun Sep 16, 2007 12:20 pm; edited 3 times in total

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  3. [33]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
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    Rb and Ct with the controls given and see the change of frequency, period and duty cycle.

    Astable 555 Multivibrator - doc00019
    The Interactive demo below requires images and java****** to be enabled.
    freq Hz period Sec duty cycle
    Power Ra


    kilo ohms mega ohms
    Rb


    kilo ohms mega ohms
    Ct


    uF nF

    LED1



    LED2





    Above in Gadget form, Astable 555 Multivibrator Gadget , for your ***page or Google Home Page.

    These are the formulae used by 555 and same is used in java****** without any change.

    T1 = 0.693 (Ra + Rb) * Ct charge time of Ct

    T2 = 0.693 (Rb * Ct) discharge time of Ct

    T = T1 + T 2 total period in seconds

    F = 1 / T = 1.44 / ((Ra + (2 * Rb)) * Ct) Frequency in Hertz

    D = T 2 / T duty cycle, multiply by 100 to get %.

    Ct in farads and Ra-Rb in ohms.




    breadboard1.JPG De******ion:
    Filesize: 3.21 MB Viewed: 1330 Time(s)




    breadboard2.JPG De******ion:
    Filesize: 2.29 MB Viewed: 1330 Time(s)




    18 Khz Locked in (XOR not locked in).JPG De******ion:
    Filesize: 1.63 MB Viewed: 1212 Time(s)




    18 KHz off of volt meter.JPG De******ion:
    Filesize: 1.81 MB Viewed: 1212 Time(s)




    magnified pulses 262.6 KHz.JPG De******ion:
    Filesize: 1.59 MB Viewed: 1212 Time(s)




    262 KHz locked in (XOR not lock in).JPG De******ion:
    Filesize: 1.66 MB Viewed: 1212 Time(s)




    freq counter 262_6Khz input.JPG De******ion:
    Filesize: 1.96 MB Viewed: 1212 Time(s)



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  4. [34]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
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    The limitation in this circuit is that the 4046 can only run up to 20kHz so that the input frequency is limited to 200Hz or 2kHz, depending on the multiplication ratio. This is quite adequate for measuring bass reflex cabinets.







    ernst


    100598_6lo.jpg De******ion:
    Filesize: 29.93 KB Viewed: 841 Time(s)


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  5. [35]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
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    و هيا ياشباب


    PG De******ion: thats my camra..As you can see they are very polished..hopfully it will make them more hydrophilic... Filesize: 1.35 MB Viewed: 600 Time(s)




    2nd 1200 grit sanded.JPG De******ion: thats a reflection of a ****f brace Filesize: 1.48 MB Viewed: 600 Time(s)




    both 1200 grit sanded.JPG De******ion: I have only one cell of these right now...if they work better I will have the rest done.. Filesize: 1.6 MB Viewed: 600 Time(s)




    Closed new protoboard.JPG De******ion: on the go..for science presentations Filesize: 2.36 MB Viewed: 600 Time(s)




    curve traser.JPG De******ion: This works still, even with its vaccum tubes....can test mosfets, transistors, diodes...works great... Filesize: 2.02 MB Viewed: 600 Time(s)




    My workshop.JPG De******ion: Hope you like it.. Filesize: 2.29 MB Viewed: 600 Time(s)




    New proto board with buggy pll.JPG De******ion: its less cramped, but I got some work on it that needs to be done.. Filesize: 2.07 MB Viewed: 600 Time(s)




    New proto Board.JPG De******ion: Total cost, $45, case was 11...found the wood.., the pegs were 5.50 each..I had the wire and the wire ties Filesize: 2.22 MB Viewed: 600 Time(s)






    تابع الصور







    PG De******ion: I was able to include the VIC and the rectifier rack into the new case.. Filesize: 2.12 MB Viewed: 600 Time(s)




    O Scope0.JPG De******ion: here is my oscope, 60Mhz, really old, but still pretty acurate Filesize: 1.64 MB Viewed: 600 Time(s)




    Protoboard, freq gen, 50V PS.JPG De******ion: I love new stuff Filesize: 2.12 MB Viewed: 600 Time(s)




    VIC1.JPG De******ion: this has bifilar chokes, about 870 turns on secondary, 127 turns on primary, and about 50 or so per choke Filesize: 1.64 MB Viewed: 600 Time(s)




    working pll closeup.JPG De******ion: As you can see, it pretty messy Filesize: 1.95 MB Viewed: 600 Time(s)







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  6. [36]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
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    نموذج جديد وقوى

    الصورة هناStans working prototype PLL_(edited).JPG De******ion:
    Filesize: 303.58 KB Viewed: 1405 Time(s)










    ok, back to the DEMO version B2 spice 45 DAY trial program...
    Its cool becuase the pots can be changed while the simulation is running, as well as all of the capacitors and resistors....
    One thing is that the forum was not able to reconize the file extension so I uploaded it as a .txt file, just change the extension of the file back to ".cpr" once you download it....And I checked that there is no problem with changing the file back to the .cpr and it should work...if not something in the forum is doing it...
    tell me what you think and if anyone with some experience with spice programs..let me know if there is anything I can inprove..
    Thanks..


    b2_spice_dave_lawton_circuit_picture_293.JPG De******ion:
    Filesize: 198.73 KB Viewed: 670 Time(s)




    Dave Lawton PWM B2 spice v5 with VIC.txt De******ion:

    Download Filename: Dave Lawton PWM B2 spice v5 with VIC.txt Filesize: 280.28 KB Downloaded: 88 Time(s)

    total uninstall installation.txt De******ion:

    Download Filename: total uninstall installation.txt Filesize: 822.6 KB Downloaded: 68 Time(s)

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  7. [37]
    ايمن غبود
    ايمن غبود غير متواجد حالياً
    جديد


    تاريخ التسجيل: Mar 2008
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    هذه الدائرة ممتازة جدا اخى نرجو منك المزيد من الدوائر

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  8. [38]
    روح الملائكة
    روح الملائكة غير متواجد حالياً
    عضو


    تاريخ التسجيل: Mar 2008
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    مشكور كثير

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  9. [39]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
    المشاركات: 707
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    اقتباس المشاركة الأصلية كتبت بواسطة ايمن غبود مشاهدة المشاركة
    هذه الدائرة ممتازة جدا اخى نرجو منك المزيد من الدوائر
    ان شاء الله تعالى

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  10. [40]
    مبتدىءلينوكس
    مبتدىءلينوكس غير متواجد حالياً
    عضو متميز
    الصورة الرمزية مبتدىءلينوكس


    تاريخ التسجيل: Mar 2008
    المشاركات: 707
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    Received: 7
    Given: 0
    اقتباس المشاركة الأصلية كتبت بواسطة روح الملائكة مشاهدة المشاركة
    مشكور كثير
    و جزاك الله خيرا

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