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Type: Posts; User: sachinkp21587

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  1. Closed: Re: Need to make a power supply that generates +24V, +12V, -12V, +5V, +3.3V DC supply

    The design that i have attached above is for 1A fir each of voltage level generated.
  2. Closed: Re: Need to make a power supply that generates +24V, +12V, -12V, +5V, +3.3V DC supply

    Mr. ArticCynda, this project is for professional level so i cannot do that.
    I need to design a power supply for each of ours engineers desk to be used upon.
  3. Closed: Re: Need to make a power supply that generates +24V, +12V, -12V, +5V, +3.3V DC supply

    Attached is the Schematic i generated from http://www.poweresim.com/
    I need the following information.

    1. I need to tell the cost of transformer to the management. i really have no idea about...
  4. Closed: Re: Need to make a power supply that generates +24V, +12V, -12V, +5V, +3.3V DC supply

    At the max 2 simultaneous outputs will work.
    As far as i know the use of regulators will increase the heat dissipation. and bigger heat sinks will be needed.
    Also consider this, What will happen...
  5. Closed: Need to make a power supply that generates +24V, +12V, -12V, +5V, +3.3V DC supply.

    i need to make a power supply that generates +24V, +12V, -12V, +5V, +3.3V DC from 110/230VAC.
    I Have 0 experience in power supply design.
    Lets put questions one by one.
    1. what type of supply i...
  6. Closed: Sensing current upto 5A from a 45VAC source using SenseFEt

    Hi all,
    i need to build a circuit to sense the AC current flowing to a load. The source can supply 5A at 45V ac.
    I need some simple and not bulky kind of solution.


    I think what i am in search...
  7. Closed: output vrms from firing angle of triac......

    Hello all,

    i am trying to change the power to a ac load i.e. relay ( in proteus) by help of TRIAC.
    i am able to change the power as i checked it in the oscilloscope that the waveform is changing...
  8. Closed: Re: how does the data rate of a signal affects the traversal over a relay?

    Thank you for the instant and so relevant reply.
  9. Closed: how does the data rate of a signal affects the traversal over a relay?

    i am using a relay with part number RA4-12W-K. i want to use it to make a ethernet switch using this relay. i do not know upto how much speed it will support. can anybody please guide me what factors...
  10. Closed: Re: accuracy test for LM3915 led bar graph driver

    Please guide in this regard also
  11. Closed: Re: accuracy test for LM3915 led bar graph driver

    2.50dB is approximated as 3dB ? Is int it over approximation? i mean .50db error
    added i would like to know that is there any way that i can only switch of or on the led in place of toggling the...
  12. Closed: accuracy test for LM3915 led bar graph driver

    I am using LM3915 for a application of mine i.e audio level detection.
    I am able to run the ic well but my doubt is that the data sheet says that it acts as per 3dB/Step.

    How i decode this is dt...
  13. Replies
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    674

    Closed: Re: problem using bit-fields

    it says 16bits 97542

    - - - Updated - - -

    you are right alexan_e that what i think the compiler should work as per my knowledge. bt m not getting why is it taking 3 bytes for even 15 bits...
  14. Replies
    16
    Views
    674

    Closed: problem using bit-fields

    according to me the following code structure should take 6 byte i.e. (3bits *16variable)/8bits but in practical case its taking 8 bytes.
    how?
    i am using mplab c18


    even if i am trying

    ...
  15. Replies
    2
    Views
    2,129

    Closed: Re: Design a Dolby decoder AV Receiver

    Here all. is there anyone who has some knowledge over sta310 here? or have done some project? i need to make a audio player using that only.
  16. Closed: Re: Powering microcontroller ciruit by rs232 port

    as i told, i am not using bridge now. i am only using pins 4,5 connected through diode to a 5.1V zener diode, and the pin 5 as it to circuit ground.
    now this 5v and ground is used everywhere....
  17. Closed: Re: Powering microcontroller ciruit by rs232 port

    Yes i am using max232. actually whole of my circuit is already in working state. only thing i am changing is to make it 232 powered.
  18. Closed: Re: Powering microcontroller ciruit by rs232 port

    i finally tried a zener diode between pin 5 and 4. it droped out to 3.3 volts.
    thn i connected pin 4 and 7 together by help of diodes and thn to zener diode as shown below.
    now the circuit is...
  19. Closed: Re: Powering microcontroller ciruit by rs232 port

    Thanks for reply mr tpetar.

    i just wanted to know is LM317 a LDO????
  20. Closed: Re: Powering microcontroller ciruit by rs232 port

    my aim is to basically make a multi-purpose small pluggable device that can communicate over rs232. here i dont want to go for battery as that will make the size bigger (for 9volt battery) and would...
  21. Closed: Re: Powering microcontroller ciruit by rs232 port

    i am connecting as follows....
    pin 4 bridge --> 7805 --> led +ve + led -ve -->ammeter +ve -->ammeter -ve -->bridge -ve --> pin 5
    basically led and ammeter in series.

    i think the current is too...
  22. Closed: Re: Powering microcontroller ciruit by rs232 port

    I dont think so as i have tried using two different multimeters. I tried with Fluke as well as HP which has a capability of showing even in microAmps.
    Also i had measured the current when i powered...
  23. Closed: Powering microcontroller ciruit by rs232 port

    dear all, i am trying to implement the following to make a serial port powered circuit.
    95778

    in my microcontroller circuit i have a 16x2 lcd with backlight off, a max232 and a AT89S8253 and a...
  24. Closed: Re: Boot sector not beaing read properly from sd card

    This 512 multiplication was creating a problem.
    my sector read write wasnt having this line of code.
    now everything is working perfectly. thanks mbwin.

    i would like to know is this...
  25. Closed: what is this STATIC BYTE be doing here?

    i am working on keil IDE using realview mdk-arm for a project based on LPC1768

    i made a header file as below


    #ifndef _test_h
    #define _test_h

    #include "diskio.h"
    #include "spi.h"
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