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fever16

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Posts posted by fever16

  1. hello guys,
    its a very good and nice thread for 3-axis cnc.
    of course its a long thread of 22 pages (took me 1 whole day to read and understand) but iam able to solve my lot of doubts and questions.
    thanks guys (spl. MP,nikolaw and GreekPIC... others too)

    i saw lot of questions regarding the PCB layout.i think they arise bcz of the improper design software.the author shld have provided them in eagle etc format so that it will help while making the pcb.i'll be real thankful if some one could do that.(if someone has it already pls do post)

    some of my doubts that need clarification:

    1.in the below pic is that 5v regulator only?
    2.how to connect home limit switches?
      if we use 3 limit switches for home then overall we need 6 switches. right?
    3.i have some 5-6 wire stepper motors from old printers.how to know whats their  voltage rating.imean 12v or 24v etc

    and has any one used this entire setup roughly?
    i just want to know how efficient it is?

    once again i want to thank all of u for providing some much info.

    indefexphpdw7.jpg

  2. hello all,
    i need 5v supply from my vehicle 12v battery.i know i can use 7805 but the problem is my circuit drives 20 LEDs continuously which roughly needs more than 400ma of current(over all).and the area is so conjusted i can't mount a big heat sink.
    so can i use dc-dc converter for this purpose.
    which chip is best for automotive project (if it is from MAXIM i can order a sample  ::) )
    thanks

  3. hi all
    i have been working on this project from 2 weeks.it worked nice.
    it is really worth making circuit.

    IMG_4354.JPG

    there 2 types of circuit.
    1.it uses 600:600 center tapped transformer
      http://www.grynx.com/projects/build-your-own-chat-cord/1/

    2.this uses combination of resistors and capacitors for audio processing
    http://www.grynx.com/index.php/projects/simple-skype-voip-analog-adapter/

    now the problem is in my place this center tapped transformer is not available.so i went for resistor based circuit.it worked but the in/out going sound levels r very low.so is it possible for any improvement in this ckt.
    is amplification of sound levels  possible?

    can u modify the circuit for better performance.
    thanks

  4. i think magnetic sensors work efficiently at high speeds compared to IR sensors.
    u can uses a pair of magnet and halleffect sensor for calculating RPM.

    i dono much abt pic programming.but i came across such RPM counter while searchig for LED POV stuff
    http://www.raphnet.net/electronique/pov_leds/pov_leds.php

    scroll down,and at v2.2 tag u'll find a rpm counting led pov.

  5. hi all
    iam working on a school LED project.where we need to use a 3.6v 300ma battery(one used in cardless phones).u know cordless phone chargers are dumb type.can u suggest me some good charger for this battery pack.
    i don't want  hi-fi type of charger.just simple one which makes the battery last for long times without destroying it.and if it got some indictor it would be great.
    thanks in advance

    b00005qz0r01lzzzzzzz6xu.th.jpg

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