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  1. prateeksikka

    How to build powerful neutral or earthing

    hi there! thats not a big thing to worry! upto 50V u can play with! grounding is a problem at high voltage,just make a small pit and put the wire in it.cover with mud!thats it.Alas! your gold plans lost! ;D
  2. prateeksikka

    transformer windings

    hi kevin! Do all the windings have a common ground? With a good quality multimeter,try out checknig b/w winding-winding point and winding -ground poiint. :D Such transformers are used to change turns ratio and thus get varying voltages at the o/p. depending on the requirement.in your case i...
  3. prateeksikka

    TRANSMISSION LINES

    hi alun! you are again and again talking about the source impedance in supplying lethal current.do u think a 5V battery open cicuit without internal impedance would be sufficient to kill a person? ;D how much min voltage source can kill a person if no resistance is b/w the body and source? :-\
  4. prateeksikka

    TRANSMISSION LINES

    hi alun! yes in continuation with that you might have noticee it with a 6V battery ,even if you short it with a wire u see a slight spark or somewhat heating effect and tingling sensation if you touch it to your sensative part like the tongue, in other words it is insufficient to kill you.while...
  5. prateeksikka

    How to build powerful neutral or earthing

    deeper buried the ground wire better it is considered.it must have some metal and then a layer of stones around. ;D ;D ;D prateek
  6. prateeksikka

    TRANSMISSION LINES

    hi alun! i apologize for using block letters. believe me i am not shouting  and i am as soft as a cotton ;D. can u tell me when a person gets killed by a shock, is it the high voltage which kills the person or high current.A book in physics by resnick and halliday which i studied in school shows...
  7. prateeksikka

    Time out circuit

    hi audioguru! i know that the limits would be crossed and it will be quite difficult to chose RC combination for the same.but what would be the problem with a 555? what are these CD4541 AND 4060? I havnt heard bout them earlier. :o prateek
  8. prateeksikka

    Time out circuit

    HI THERE! USE AN RC CIRCUIT IN SUCH A WAY THAT VOLTAGE ACROSS C RISES EXPONENTIALLY, FEED THE CAP VOLTAGE TO THE BASE OF A TRANSISTOR IN CUT OFF.CHOOSE R AND C SUCH THAT AFTER 15 MINS VOLTAGE ACROSS C REACHES 0.7V,THE TRANSISTOR WILL  BE DRIVEN INTO SATURATION AND CAN BE MADE TO SWITCH ON AN LED...
  9. prateeksikka

    LIGHTENING STRIKES

    HI THERE ALL! CAN ANYONE TELL ME WHAT CAUSES LIGHTENING STRIKES IN RAINY WEATHER. I HAVE READ THAT IT IS DUE TO SOME IONS BUT HOW I DONT KNOW. FROM WHERE DO THESE IONS COME? ::) PRATEEK
  10. prateeksikka

    TRANSMISSION LINES

    HI ALL! YOU MUST BE KNOWING THAT ELECTRIC POWER IS TRANSMITTED AT HIGH VOLTAGE AND CURRENT IS KEPT LOW.REASON IN SUPPORT OF THIS IS THAT HIGH CURRENT GIVES MORE I*I*R LOSS IN POWER.I WISH TO KNOW THAT WHY WONT HIGH V*V/R LOSS BE SIGNIFICANT HERE WHICH IS ALSO A FORMULA FOR POWER LOSS AND...
  11. prateeksikka

    please..........please..........please

    hi there! if you wish to study electronics right from the scrap,it would be good for you to first brush up a good book on fundamentals of electronics. like malvino leach,millman halkias etc.u can also look up some good electronics tutorials availablle on the web ;D prateek
  12. prateeksikka

    Create circuit for 4-20mA simulation

    hi there! what can be simulated on 4-20mA. these are the transmission limits of sensors in telemetric transmission. what else? ;D
  13. prateeksikka

    Identifying a unmarked transforrmer?

    hi there! i still feel that the problem lies with your transformer,try with a new one. Thinking that the problem is with the fuse,dont remove or replace it if it is getting blown up,otherwise it is dangerous for your costly kit ur 1200$ are in jeopardy!! ;D Do tell me the results with a new x...
  14. prateeksikka

    What do the Address and Data Pins do on an EPROM?

    actually address bus carries the location in which u wish to write and data bus carries the data to be written in some cases they are time multiplexed to save extra wires(lines) ;D prateek
  15. prateeksikka

    Board Design Programs?

    hi there! ORCAD CAPTURE WITH LAYOUT EDITION AND PROTEL ARE VERY HANDY WITH PCB DESIGN AS THEY HAVE AN OPTION OF AUTOROTING THE BOARD. ;D PRATEEK
  16. prateeksikka

    High Quality electronic sites

    hi ! some more: hobby circuits www.aaroncake.net
  17. prateeksikka

    circuit simulator

    HI AUDIOGURU! I GUESS SIMILAR ANALOGY HOLDS WITH ICS TOO.I KNOW THAT uA741 uA stands for fairchild,M for motorola etc and 74 for ttl logic thats it. ;D prateek
  18. prateeksikka

    Identifying a unmarked transforrmer?

    hi there stuee! Any type of fuse can blow up only when the current rating of that fuse is exceeded.this can further be mainly due to 2 reasons: Firstly,the xformer chosen by you is not of appropriate rating.i.e it is of lower rating. Secondly,you are connecting the stepdown xformer in opposite...
  19. prateeksikka

    circuit simulator

    hi audioguru! are u aware of the numbers of the transistors.As u said say"BC547A" what do "BC" ,"547" AND "A" MEAN? DOES IT HAVE ANYTHING TO DO WITH PACKAGE .I JUST KNOW THERE ARE PACKAGES LIKE TO92.DO U KNOW WHAT THESE TERMS LIKE TO92,BC547 ETC MEAN? ;D PRATEEK
  20. prateeksikka

    Night Vision Camera

    hi junaid! how are u planning to use IR radiations in it? is it a substitute to your flash?plzexplain the principle of its working. as far as i understand u mean to use IR radiations at night as compared to white light in day time.right?use a binocular lens for better resolution. but again there...
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