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Update poly synth controller 25-01-2015

I put the voltage distributor circuit  from the veroboard to the S/H board
and added trimpots for offset compensation.

VoltageDist sample -hold_web_small

 

I made some measurements at the voltage outputs and saw that they
are allways to high but the ratio seems to be okay.

CVOutOscill_web_small

Here a picture from the oscilloscope

1mv/div,  0.5ms/div
10:1 Probe

I think i have to add a FET switch to change the circuit from Track and Hold to a real Sample and Hold circuit.

Schematic will follow….

 Here you can here the first Chords.

 

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