Hi !
I want to connect 8 pots to my Midi I/O core.
When i edit a preset file within a table editor, it displays inputs 0 to 5. I would imagine it going from 0 to 7. Can i simply add 2 lines in the table ?
thanks !
As a side note, i’ve got a lot of parasites when sending a CC. My Pots are 4.7 KOhm with 100 nF capacitors. it looks like the capacitors are not filtering anything.
By parasites i mean many occasional drops to 127, or constant flow of +/- 1 in the CC’s value.
Any idea ?
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.
i see ! Makes sense !
Well, i’ll go for an AINSER 64 then !
Thank you very much for your answer. MidiBox is so great… awesome community as well.
HI
Solved the problem of parasites with Ainser64?
thank!
Hi folly !
i’m still waiting for my AINSER64 kit, it should arrive shortly. I’ll let you know, but i’m pretty confident, since TK. recommended it precisely for this reason.
I’ll post back here.
I have not yet solved the problems with jitter even though I tried with ainser64.
with STM32F DISCOVERY you solve this problem?
Very sorry, i’ve used midibox only once, and since i broke my AINSER chip, i ended up using an arduino for pots.
HI! that the project ARDUINO used?