CD 4066 volume control design

rajaram04 · May 10, 2013

Hello sir
I am planning for a new design based on post office box theory to design a volume control

Iam designing for 15 steps & one cutoff to mute down the volume

Please tell me if i can use CD 4066 for tapping all resistors in series ???

Is it dangerous for the audio line ???

would it harm amplifier or the music player ???

I just want for each step to tap all resistor leaving one free for the purpose to make a volume level at the moment & ll tap all resistor for the full volume level & lastly a 16th out for the purpose to mute the volume level

please help

chuckey · May 10, 2013

looks like an interesting idea. Your incoming audio must go through a capacitor then be biassed to 1/2 Vcc to keep the signal between the Vcc line and earth. Then you need anoother capacitor and a resistor to earth to restore the signal back to AC.
What steps of attenuation are you going to use?
In a similar vein, I have had an idea for an audio attenuation, based on sampling the audio with a variable mark/space ratio, high frequency pulse wave form. If there are .1 micro seconds "holes" in the audio every 1 micro sec, then after the filter, you should get 90% of your audio. If you change the mark/space ratio so the "holes" in the audio last for .99 microseconds, after the filter you will get 1% of your audio amplitude.
Frank

rajaram04 · May 10, 2013

chuckey said:
looks like an interesting idea. Your incoming audio must go through a capacitor then be biassed to 1/2 Vcc to keep the signal between the Vcc line and earth. Then you need anoother capacitor and a resistor to earth to restore the signal back to AC.
What steps of attenuation are you going to use?
In a similar vein, I have had an idea for an audio attenuation, based on sampling the audio with a variable mark/space ratio, high frequency pulse wave form. If there are .1 micro seconds "holes" in the audio every 1 micro sec, then after the filter, you should get 90% of your audio. If you change the mark/space ratio so the "holes" in the audio last for .99 microseconds, after the filter you will get 1% of your audio amplitude.
Frank

wowww stunning explanation sir hats off

sir audio signals are from a music player like dvd etc

& too from musical instruments i have here

also i am using external sound cards for laptops

thanks

sir would you please let me have a diagram of design you are explaning above #2

i will be highly obliged if you can send me a very basic schematic :razz:

thanks thanks thanks a lot once again

CD 4066 volume control design

rajaram04

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chuckey

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rajaram04

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CD 4066 volume control design

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