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  1. nabhatti

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    could you please explain why do we need C2 in series with resistor R4? how is that capacitor effecting the rest of the circuit? by increasing the value of C4 , will we increase the circuit speed or decrease it
  2. nabhatti

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    thank you very much sir i did made the project work and its doing whatever its supposed to do , moving the LED's along with the music. just one question . for the extended circuit, we have transistors that make up a 10 mA current source. how is that 10mA helping us in lighting the strips. once...
  3. nabhatti

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    Hello audioguru, I am naveed's team partner. Thank you for helping us with the dancing LEDS. We are at a point where, we really need to get some specific information related to this circuit(Dancing LEDS). Some thoughts i had for the specification are: 1)what can we predict about the...
  4. nabhatti

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    in the project fading LED's under motor, light and power control, R5 is it a 2 Mohm resistor or 22 Mohm. also R1 and R2 are 47 K right. The values of C1 and C2 , are they nano farod or micro farad. the units are not clearly shown. that is why i am asking you thank you
  5. nabhatti

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    the terminal labeled (+) beside R11 will be connected to the battery right. im talking about the extension circuit.
  6. nabhatti

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    if you look at the extended circuit, there is a R9 terminal and a terminal at the top with a (+) sign beside it. where will we connect those terminal in the original circuit.
  7. nabhatti

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    for the extended circuit, can i use 2N3904 NPN transistor instead of BC337 and 2N3906 PNP transistor instead of BC327 thank you
  8. nabhatti

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    i wish to extend the circuit but can not understand where to connect the terminals of the extented circuit. could you please let me know. once again , my project is Dancing LED's
  9. nabhatti

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    could you please let me know from where to buy the electret microphone. again, im living in Houston,TX. thank you
  10. nabhatti

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    i builded the circuit and everything but when i tested it, i didnt work. no matter how high the volume is ( or low) the LED's wont move. also i changed the distance of the microphone from the radio but still same results. i then tested the circuit with a square wave having 0.1 [v] ampliude and...
  11. nabhatti

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    in the project (dancing LED's) , C5 is 25V electrolytic capacitor. what does that 25V specify. also , if i use a 100uF 50V electrolytic capacitor instead of 100uF 25V electrolytic capacitor, will that be ok to use. thank you.
  12. nabhatti

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    i just have a few things to clearify. the gain mentioned in the project ( dancing led's ) is 100.  i am assuming the gain mentioned is the maximum gain. and also is it a voltage gain or a signal gain ? im assuming its a voltage gain thank you
  13. nabhatti

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    im looking at cd4017be for the decade counter. is that going to be good for this project thank you
  14. nabhatti

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    since im using this circuit inside an electronics lab, im going to use 741 op amp powerig it up with 15 volts and powering the counter with 9 v . i also tested my circuit in pspice and it amplified the input signal 100 times at the output. now i tested the circuit again by removing R1 , R2 and...
  15. nabhatti

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    i went to the website to purchase the op amp but there are so many of them e.g, LM358AM, LM358P etc. which one best suites this project. thank you
  16. nabhatti

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    i was looking at the circuit last night and i have a few questions for you as far as i understand, IC1A takes as input music or speech signal and amplifies it 100 times. i understand that the output of the op amp is synchronous with the input, that is for a certain frequency , whatever the...
  17. nabhatti

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    im presently residing in houston tx. could you please let me know from where to purchase these op amps.
  18. nabhatti

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    so that means i have no other choice other than using the LM 358 dual low power supply op amp. or do i have an alternative. also if i need to buy that LM 358 op amp. where can i purchase it . thank you
  19. nabhatti

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    thank you very much for your reply i have one more quick question if i need to use another op amp, which needs both negative and positive voltage to power it up , can i do that for example 741 op amp if i have more questions i will ask you thank you
  20. nabhatti

    Additional Information

    thank you very much for your reply. i was looking at the dancing leds topic in the section of motor, light and power control. in the schematic, i can see that IC1B is being powered up by B1 by connecting it to pin #8 but also pin # 4 is grounded. as far as i understand , if one of the powering...
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