> Amplify the input signal
How to do that have heard of LM386 or op amp($10) what they say to improve the signal but dont know the circuit moreover they are costly what i think isnt it. Also i have seen circuits where they dont use those but still get brighter display of LED's so am confused.
>Please let me knw how to amplify in cheap
If the input is from a microphone, a line level or a headphones level from an ipod then you need an amplifier.
An LM386 costs only $.93US from Digikey today. They have more than 10,000 in stock.
An LM386 is a little power amplifier that amplifies as much as you want and is powerful enough to drive up to 36 LEDs.
>Bass sound in mono
I have done that in last strip of led right+left = mono isnt it ? if am not wrong
since during these many days i have found that connecting these two channels create a mid pass filter which is not with me
You are simply shorting the two channels together which will destroy an amplifier if the input signals are speaker levels. Then all of your outputs are mono. You are supposed to use an audio mixer circuit to make mono. Some audio mixers are simply two resistors.
Your circuit has no filter. You need an active bandpass filter or an active lowpass filter to make only bass sounds.
All blink same nothing diff and all with same intensity
Because you simply shorted the left and right channels together so they produce mono exactly ther same.
> and lastly about separating frequencies
i have seen those but since am not a electrical student i am not aware of those, those are like cryptic symbols and am not able to understand.
There are many circuits on the internet that use inexpensive opamps to make active filters.
1) Your circuit is missing input resistors so the base-emitter junction of each transistor shorts the input signal which will destroy a speaker amplifier and/or destroy the transistors.
2) Your circuit is missing rectifier diodes so a speaker level will destroy the transistors (their max allowed reverse voltage is only 5V).
3) Your circuit is missing resistors to limit the current to the LEDs. Then the LEDs burn out.
4) Your circuit has LEDs in parallel which is wrong because all LEDs are different. An LED with the lowest forward voltage will hog all the current and burn out. Then the next LED with the lowest forward voltage will burn out.
Since you know nothing about electronics then I suggest that you buy a kit for a color organ.
I designed this circuit that will drive up to 18 LEDs. If you make it with two LEDs in series replacing each single LED then it can drive up to 36 LEDs. It has no filters.