using piezo disks to create pickup system
 

Hi there,

I'm trying to figure out how I could ever wire several jacks in serie/parallel (no idea) together so I can have multiple input going through only one output.
The purpose is building a vibraphone pickup like this k&k sound system:

Vibraphone Amplification - K&K Sound

or this self-made system:

Homemade vibraphone pickups

I found this schematics on a forum but I'm not able to understand any single thing. How could I start from this drawing to finalize my mixer in the real world ?
http://www.groupdiy.com/index.php?ac...ch=11004;image
Does somebody out there know how to "link" those jacks ?
Thank you so much,

Benoit

http://www.casperelectronics.com/ima...s/mixer_sc.gif

:cop: Image removed by moderation and replaced with link due to copyright concerns.

Hi,

Many variants of the standard mixer circuit, you can keep adding
input channels to the virtual earth mixing point, pin 2 of ICa.

You might need to add active buffers on each input for high
input impedance to suit the piezo's, TL074 or similar.


rgds, sreten.

1) forget about the mixer posted above, it has absolutely useless 10K input impedance.
And inadequate 4 channels only.

2) you will need a lot of individual Piezo Preamps, such as this:
http://www.diyaudio.com/forums/attac...stereopre1.png which is good for 2 piezos, and then mix their outputs.

How many Piezos will you need?

Is it acceptable to have just a single "main" volume? (I guess so).
Because that will simplify design *a lot* .
Don't think you need individual note volume adjustment, do you?

Then I may suggest a general, *many* inputs mixer.

What will you drive with it?