Audio "Control" Circuit

[Cerf]

Hello,

I am new to the fourm, so I am assuming that this is a good place for me to post, I am a high school student with some digital circuit knowledge.

What I want to do is extend my skills with some simple projects

What I want to do is design a device that has two audio outputs, one audio input, and one digital input. The purpos of this device is, if the digital input is high, the audio goes to output 1 and if the digital input is low the audio goes to output 2.

I dont have to worry about gain or any noise in the circuit at this point - just a simple reference or tutorial would be great, thanks

Does anyone know how this can be accomplished?

 

[trigger74]

You can use , for example, 74HC4052, to control the single input of audio to your desired output.

check it datasheet and draw the circuit....

 

[Learner]

you can also look at the 4066 signal switch chip, although I have yet to sucessfully using this and relay without adding noise of distortion to the audio signal........

 

[Cerf]

At this point I am probably going to see if I can do it with a 4016 (CMOS quad bilateral switch) but I am going to look into your suggested solutions to see if they are any simpiler

 

[bimbla]

REMEMBER, the signal is analog(audio) and therefore digital IC's will not do.

You will need analog multiplexers like CD
4051/67.

This will do your job the way you want.

I hope that this will help.

bimbla.

 

[Learner]

At this point I am probably going to see if I can do it with a 4016 (CMOS quad bilateral switch) but I am going to look into your suggested solutions to see if they are any simpiler

The simplest method imho is to use a rotary switch that has make before break contact system, since it will minimise switching contact noise which I have yet to achieve with the ic switches plus no need for power supply....... you can also try it with a relay since you only have 1 position to switch to.

 

[Cerf]

The simplest method imho is to use a rotary switch that has make before break contact system, since it will minimise switching contact noise which I have yet to achieve with the ic switches plus no need for power supply....... you can also try it with a relay since you only have 1 position to switch to.

That is a good point. I should have been more specific when I said using a CMOS 4016 would be simple. I should have said that it is a very simple method assuming that I am not going to use any mechanical parts.

(I am assuming that a rotary switch is a mechanical part)