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Type: Posts; User: papunblg

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  1. Closed: function of the Zener in this SMPS circuit

    Recently I purchase a china made Rechargeable LED emergency light which contains 1 6V5Ah battery. Upon inspection I find that the circuit board contains an SMPS + a transistor switch to control the...
  2. [SOLVED]Closed: Re: Access to the same database from C# and ASP.NET

    Depending on a variety of variables, such as your server operating system, your hardware resources, and your site's performance requirements, you can configure your environment to support physically...
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    Closed: Re: pic 18f4520 pull up doubts

    http://www.microchip.com/forums/m531772.aspx
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    Closed: Re: Hi current from KA7905 & 2N3055

    :) Actually I am using a 12V 2Amp smps as source of DC and regulating it using 7805/7905. Before buying a new 5V smps I thought "Why not make my own power supply". But seeing (or may I say feeling)...
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    Closed: Re: Hi current from KA7905 & 2N3055

    @pinout,
    Before making this post, I tried 7805 with NPN 2N3055(7805 output on the base) and It worked as expected. Used a diode to overcome Vbe drop.

    But, what is annoying me is the way 7905 is...
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    Closed: Hi current from KA7905 & 2N3055

    I am trying to make an (about) 1500mA 5V power supply for a D-Link DIR-300 wireless router.

    I have a 12V 2amp smps which I am using as source of DC and using a KA7905 regulator and 2N3055 power...
  7. [51]Closed: Re: adc0804 & 0808 readings going 0 after half the total voltage read through i/p cha

    He is not experiencing the problem with Proteus.
  8. [51]Closed: Re: adc0804 & 0808 readings going 0 after half the total voltage read through i/p cha

    didn't you forget to make P0 as input?

    your code


    //ADC0804 CODE

    #include<at89x52.h> //----Including the Reg file

    //------------Assigning Control bits for LCD control---------/
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    Closed: Re: What is the value of this capacitor?

    Thanks Very Very Much FvM for giving the clue. The physical size dimension of my capacitor matches with .01mfd caps as given in datasheet.

    The problem is that triac is working. The motor...
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    Closed: What is the value of this capacitor?

    Can anybody please help?

    This is a Box type Metalized film capacitor. Color Black . Upon the capacitor written

    El-Ci-Ar
    KT 11
    01 M 1KV-

    No decimal point given. Is it .01mfd or 0.1mfd ?...
  11. Closed: What software is used to create this Schematic

    Can any body tell me what software is used to create the attached schematic? Please.
    It would be helpful if you give names of software giving same result.
    102796
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    Closed: Re: programmer for pic and 8051

    Possible (but not home made) http://www.embeddedmarket.com/storeresources/NN-102/user%20manual.pdf
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    Closed: Re: PC's power supply problem to solve

    man009,
    If you are from India, BPB Publications New Delhi publishes a good book containing circuit diagrams (showing voltages at major points ) of almost all major SMPS available in India. That may...
  14. Closed: Re: Dimming AC loads using triac and microcontroller

    1. Publish hardware / circuit diagram
    2. Publish code.
    3. Which microcontroller?
    4. which compiler? etc
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    Closed: Re: help with uln2003a with pic16f84a

    The following link shows how to use an ULN 2083 (The eight NPN Darlington connected transistors array) with a PIC16F84A.

    You will get the idea. Your ULN2003A consist of seven npn Darlington pairs....
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    Closed: Re: va calculation for transformer

    1. You can connect secondary windings of two 12V 1A of in series. If you get 0V output(12+(-12)=0) as mailus said, then simply reverse the connection of one
    of the windings.

    2. Do you have a...
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    Closed: Re: problem in JDM based PIC progarmer

    I also used this programmer without any problem.
  18. Closed: Re: Need Help in making a 20Watt Audio Amplifier...

    20W TDA2005 stereo amplifier for all suitable applications like amplifying medium power speakers. It is suitable for car use but before, the power supply must be choked with at least 150mH and it...
  19. Closed: Re: Need Help in making a 20Watt Audio Amplifier...

    Arun,
    Check your TDA2005 circuit once again. I have used this IC in the past and it worked fine. Check your power supply also.

    - - - Updated - - -

    Power Supply: You need 8 to 18 Volt 3.5 Amps...
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    [SOLVED]Closed: Re: epson lcd projector problem

    Projector lamps will last the longest in operating environments that are relatively dust free and used under normal operating conditions of three to five hours per day. Those that are used more often...
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    [SOLVED]Closed: Re: epson lcd projector problem

    Also make sure that the inbuilt cooling fan's output is free from obstractions. Do not power off the wall power socket immediately after using the unit. After switching off the lamp of the unit ,...
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    [SOLVED]Closed: Re: epson lcd projector problem

    Projector lamp life is rated in hours. As they near the end of their life, the lamps begin to lose power and with it you'll notice the image getting dimmer. Some projectors include a feature on the...
  23. Closed: Re: stepper motor problem

    Publish code, circuit etc.
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    Closed: Re: LCD Routine... How it works?

    void lcd_data_str(char str[50]) //Function to send string
    {
    }
    This is not the way to pass the address of an array to a function.
    Read "How to pass base address of an array to a function " and...
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    Closed: Re: Battery charger working.

    This is a circuit diagram of an indicator + 2 Amp charger to sense/charge battery of 12 volts. Working principle of this circuit is the battery voltage compared with the reference voltage. By using...
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