Hi! This is my first project with Arduino and I'm a little lost.
I restored an old lightning desk which output a 0-10 V signal and I'd like to build a multiplexer to control DMX lights.
As I have 24 analog outputs, I plan to use a multiplexer. I thought of using a CD74HC4067. My problem is it only accept up to 5V so I'll need to divide the tension of the 24 pins before the multiplexer. The only way I know to do this is to create tension dividers with 2 resistances per output. And it is a lot of resistances.
Do any multiplexer exist which allows a higher voltage input? And would it work to create a tension divider between the multiplexer and the Arduino? Or would it mess the signal up in some way?
Thanks,
Elliott
Resistors are your best chance. You can get resistor arrays where they are in a single package. This may help:
This would do 4 channels so in total you would need 6 packages. There are other combinations available. Generally the resistors in an array are closely matched which is much more important than the absolute value.
Look at the CD4051B and its ilk.
One divider at the output.
HTH
a7
Placing the dividers before the multiplexer is necessary. Or you have to use a mux that can tolerate 10 V input.
And it is a lot of resistances.
And the easiest, most straightforward, part of your project! 
Where I work we use some tiny surface mount resistor packs but I wouldn't use them on a hobby project because I don't have the soldering skills for that small stuff. 
But you can also get DIP & SIP resistor packs with 0.1 inch lead spacing.
I restored an old lightning desk which output a 0-10 V signal and I'd like to build a multiplexer to control DMX lights.
Or since you restored it, maybe you can convert it to 5V... Or maybe add a 5/10V switch. But if you make is switchable you'd want a protection circuit on your custom DMX circuit.
