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Everything posted by faizanbrohi

  1. I did not know about the changings , i bought all the parts that were written , and i have found them with the exact rating , so should i buy again ... :-[
  2. So increase the number of channels per output .
  3. so for a class D Amplfier we would consider increasing the current first , as it is done in this project.and then add a transformer , or vice versa
  4. One more thing , can not we change the wave shape of square wave 220V AC to sin ewave
  5. Forget about the complication , how can we paractically implement it in Class D amplifier , and if not , can we run computer on a square wave
  6. Now Can we use a Sine wave oscillator instead of a square wave osicllator , this would increase performance for runnning systems that need sine waves .. ???
  7. i have a question how can we implement negative voltages in this power supply , i mean +-30V , do we have to build another unit for negative voltage ,
  8. A switching Class D AMplfier is hard to make , is it no other idea to use any other type of amplfier.
  9. So are there any ideas for a switching amplifer and how is it to be interfaced with my oscillator idea... and the transformer one..
  10. ok i get it , it heats more at the oscillator stage , but it can be a way to tackle it good ....
  11. I think you don't get the point i am saying if use a ordinary sine wave oscillator and then attach it to a Step up trasformer , that is it
  12. i have another idea why use a power amplifier ;D Generate a Sine wave oscillator and then use a transformer simply to step up the Signal of 10V to 220V , i mean as simple as it gets . Beacuse since the 10V is an AC SIgnal. But as simple as it is , the Current Rating of the oscillator should be very high . so we can make a sinewave oscillator using power transistors with high current ratings , or power op amps . plz reply if it is correct ???
  13. THere is an idea in my mind which i want to ask if it is applicable or not. THe Idea is to create a SInewave Oscillator , amplify the sine wave signal and that it reaches a 220V P-P , Sine wave oscillator --> Class A Amplfier --> 220V Sine wave AC Signal The only thing i don't know is how the amp need to be designed or even if this idea is correct
  14. I am also interested in this project , balong please hurry and send the PCB layout and schematics man.. i was actually trying to do it with a more easier approach , using FM band and then using carrier audio signals of range 1Khz to 10Khz at the transmitting end and filters at the recieving end to filter those frequencies using a frequency filter of the particular range. however this is just and idea of my project that i am trying to build... not tested. For Transmitter i intend to use TX-500 Transmitter which is a 1/2 Watt transmitter and has a decent range. and reciever i use a commercial Radio kit which costs around 1.2$ with amazingly great sensetivity , using a Sony SMD AM/FM Radio chip ..
  15. HEllo everyone , i would jus like to confirm that if the Eagle Version of the voltmeter is correct to build , because i need acurracy. i am trying to build a digital voltmeter so i can attach it to a LM2907 Frequency to Voltmeter Converter , and measure frequencies on the range of 1hZ till 10Khz . although i can also use low pass , band pass and high pass filters for frequency to voltage conversions, then again does the meter has milivolt range and is it that accurate... if this project is complete a higher VHF Filter can be used to measure VHF Frequencies
  16. I have got 2NU41 Rectifier Diodes , will it work on 6A or not , i am talking about the power supply. I have seen the graph in the datasheet and it has high current ratings
  17. Hello Everyone , i have a query . The BDW84D BDW83D darlington pairs were really hard to find but luckily i found them. i am wondering if we can use substitute parts for the BDW84D and BDW83D , which are available like BDW84A and BDW83A is really easy to find and even BDW84D is easy to find . So my question is that is there a substitute for BDW84D and BDW83D. one more thing i am remaking the inductr and this time winding it on another resistor of 1W with smaller length , i will send some pictures soon of the inductor and the darlington transistors i found also...
  18. Audioguru i have compared the 1W resistor diameter with the modern one also , the diameter is actually the same ... but the difference is its length... and ofcourse we are only interested in the diameter...
  19. The resistor is surely 1W but it is just a little longer thats all , does the length of it effects anything , because you just need the dia of a 1W resistor of any value.
  20. I Know About the 1ohm resistor , i have not fully assembled the project , i am just asking if the inductor is wound right.
  21. Here are the pictures (only of inductor ) . you might see that the project is not fully assembled. but just see the inductor wound around 10 turns of 24SWG(0.55mm) copper wire.
  22. Hello , Everyone i build this project but because of the two wrong darlingtons , i bought BDW84A and BDW83A and a little inconsistance i am building it again. i want to just confirm that i have wound the inductor 10 turns on 1W resistor of 1.5Kohm i found from my electronics junk and the wire is 24SWG copper wire enamel coated (24SWG = 0.55mm). i will send some pictures of it so please see audioguru if i have done the right thing .
  23. Can you Tell Me the Theory behind this Audio Amplifier . plzzz
  24. Who is this member you are talking about audioguru that has replacements
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