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MiDI IO 128 : Pots setup


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Hi,

 

J5B.A6 and J5B.A7 are allocated by the third MIDI IN/OUT port, therefore these pins can't be used as analog inputs.

 

And the "parasites" (jittering values) are unfortunately normal - there is no way to fix this properly. The LPC17 has bad ADCs, and they are only working at 3.3V which means that the s/n ratio is lower than for ADC working at 5V.

Therefore the usage of the AINSER64 module is recommended.

 

In future, also an inexpensive AINSER8 module for 8 inputs will be available: http://www.ucapps.de/mbhp/mbhp_ainser8.pdf (prototypes are ordered).

Due to the simplicity, this "module" could also be built on veroboard (cheapest solution).

 

Best Regards, Thorsten.

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