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Everything posted by shekhar_dandya

  1. bandwidth = bit rate * data width if data width = 1 i.e serial communication,then bandwidth = bit rate
  2. Hi All, I wanted to know a simulator that would simulate the hardware of a logic devise i.e an fpga or cpld Thanks, -Shekhar
  3. Hi AudioGuru, If I select the above transistor and if the Ic -Vce 'test conditions' don't exist in my circuit i.e I have my own Ic Vce depending on my curcuit conditions then what beta should I consider? Thanks, -Shekhar
  4. Hi, Any Data sheets of photodiodes in visible light range and reasonable price range? Does our forum has any? THanks, Shekhar
  5. Hi all, I want to know how FIFO buffers achive synchronisation?Through semaphore or arbitration? secondly,Can one read a partially filled FIFO buffer?How? Or one has to wait till buffer gets filled completely? Thanks & regards, -Shekhar
  6. Hi All, I urgently need instruction set supported by JTAG
  7. what is the advantage of reading if one is going to modify i t? Is it that the value is read,compared to the one selected for modification then if they are same,the value is not rewritten.if there is a mismatch,then the new value is written? -Shekhar
  8. Hi All, I was planning to build such an F.M transmitter and got a lot of important information through the threads.thanx EL :). Actually I was planning to connect such a transmitter to speaker output of my computer so that I can hear MP3 and other music from my computer on my radio FM band. I think it would require an impedence matching stage at the i/p.but what x'tor configuration to use that has a low i/p impedence(8 ohms) and a high o/p impedence(in kohms)? The second thing is how do you decide the range of x'mission? Thanks -Shekhar
  9. Hi Everyone, Does LOS mean that the t'mitter and the r'ver should see each other? what if I want to send a signal a few stories up/down my building?In that case how will the x'mission be, considering omnidirectional antennas? -Shekhar
  10. Hi All, I wanted to know what is meant by a read-modify-write operation?how is it different from a normal read/write operation? Another ques: What is a tri-state?what is the voltage on tri-stated pins? Thanx -Shekhar
  11. Thanx Ante.This was nice one to statr with.But I need still more understanding of the basics.I searched on google but did not find a satisfying article. need more help especially how it is used for FM detection etc,tone decoding.. -Shekhar
  12. Hi All, Can anyone explain me how a PLL works and what is its basic aim? Thanks -Shekhar
  13. Hi All, Why is X'tor not a symmetrical device i.e if c-b is forward biased & b-e is reverse biased will it function the same and give same characteristics? I heard that FET's are symmetrical when used as switches.Is it true? rgds, -Shekhar
  14. Hi all, Quote from MP: Well,this was just a question asked to test my friend in an interview. Thanks -Shekhar
  15. Hi enigma one, So this again means u require 1 million locations to store
  16. Hi Enigma one, FIFO of what size? -Shekhar
  17. Hi Everyone, This was the question asked to one of my collegue in interview: Data is comming on a serial line at 1Mbps.I want to delay this data by 1 sec .How do I acomplish it? Using shift register with a 1Mhz clock and 1 million+1 D flip flops. This is my answer. Is there any more elegant solution?
  18. Hi Audioguru, That may be the case. I have a rather cheap DMM with only 2 ranges for a.c 750V,200V. So I just wanted to confirm that my circuit is not at fault.Can I continue using the circuit? Or else this false signal(If it exists) may damage the load? -Shekhar
  19. Hi AudioGuru, Thanks for the soldering tips.I did not make a PCB for my circuit.I just used a general purpose board that provides only mechanical stability to components and soldering pads to adhere the components to the board. As far as your high power X'mitter speculation goes,I have our city 's TV transmitter as well as our local radio's FM X'mitter nearby i.e about 50-60 km away.Could that distance be a problem? Well the big prob is I don't have a CRO to watch the effect. Anyway if you say that this isn't going to cause any problem to power small electronic circuits (cordless phones,radios/tapes etc)I will leave the problem as it is. Thanks all of you for your cooperation and patiently replying my silly questions. -Shekhar
  20. Hi Kevin, I am using a TO 220 package and have connected pins properly. I have no problems with d.c. How does 317 ener voltage follower mode ? I have used a 240 ohm resistor from o/p tp adj and a 330ohm in series with a pot of 4.2K from adj to ground.I have also pput a 10uF cap at the o/p to reduce the ripple. Can I just neglect this thing happening for practical applications? I heard that people making adapters(ac-dc converters) do not bother to use a regulator as well. Am I expecting too much from my cheap circuit? more help needed. -Shekhar
  21. Hi everyone, Well I did not require to use caps to earth for secondary.Its not showing any dc voltage now.But at the o/p I still get 6V ac when dc o/p is 3V and 56V ac when dc o/p is 25V(both no load.).Also the conditions did not improove with a load of 330 ohm resistor as a load. when the DMM connections are reversed(i.e +ve lead to -ve of 317 and -ve lead to +ve of 317)I am still getting 0V. (Whereas I expect at least a -ve voltage).Can this be due to bad soldering? My soldering is horrible.I don't have a scanner to show you people. The dc voltage between o/p and adj pins is 1.25Vdc.When measured with DMM knob kept on ac it reads 2.2V.Again,with the DMM leads polarity reversed it reads 0V. The dc o/p at the i/p of 317 ie across the filter capacitor is 31Vdc.when measured with knob kept on ac it reads almost 68V. Again the same thing ,you reverse the connections and it reads 0V. Somewhere in the ongoing thread Suraj said : .COuld this be the case with DMM's? Help needed. Thanks -Shekhar
  22. Hi Guys again, This time I checked the o/p of my 317 by keeping the DMM knob on 'AC -V'. WHen I connect positive of DMM to positive supply terminal and -ve to ground,I see 29V AC(RMS?).When I reverse the connections(+ve t o ground & -ve to +ve) my DMM shows 0V! what exactly is the nature of this voltage and why is it affecting? Thanks, Shekhar
  23. Hi everyone, I needed some docs /tutorials related to USB basics Thanks -Shekhar
  24. This is amazing stuff.I have got the first two volumes I did not know there is more! Thanks electronics-lab :D
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