monkeyboy

Sucess ;D The 100 uS interrupt has solved all the problems with POTs appearing to effect each other and the deadband has stopped the fluctuating being a problem, all i have to do now is replace the Log sliders i bought by accident :-[ thanks a lot for your help! Regards, Dale

sorry, here is the schematic, http://www.mooload.com/file.php?file=files/1133563665/midibox+schem.jpg

Hi, Sorry long time for reply, have been away for a while, am very happy to hear you give non MIOS uses help :) here is the schematic, have tried de coupling the 4051 but didnt seem to help either there is also buttons in the circuit but i am certain they are not the cause of the problem (hard or soft), thanks, Dale

I am attepting to implement my own code in C as i would like to have the knowledge of how to do it, and am finally there apart from this :) i assume from your reply that this site is only for people having problems with MIOS, and not for anyone just trying to make a box of midi dials and buttons? Thanks anyway, Dale

Hi, I am attempting to implement a midi box using a PIC16F877A and am having issues with a 74HC4051 8 channel analouge multiplexer. If i read the POTs straight into the ADCs multiple channels then all works as expected but as soon as i put the multiplexer in the following problems occur: 1. POTs appear to be affecting the values of other POTs (even though the input voltages are not) 2. most of the POTs dont go up to max value 7F but linger around 60 even when they are on 5v 3. A small fluctuating effect which wasnt present when reading directly into the ADC (even though the same circuit is connected) have tried slowing down sample rates, putting delays between selecting pots and reading them. all have not helped at all any pointers greatly appreciated! thanks