joystick: i tried and i failed...

[bosone]

i tried to recycle an old PC analog joystic and to mount it into my midibox.

as some of you would remember, i had to amplify the joystick signal by 10 times.

so i "powered" the joystick with 8 volt, and took the ouput (0-1 V) to a lm324 amplifier, then to the midibox ain.

the problem is that i have a LOT of flickering, and the joystick is almost unusable... the pot values oscillates araound the midi CC values of about +/- 15

ex with the joystick stopped in a particular position, i get CC random values between 60 and 90!!

is there a way to reduce this flickering? (even a software "filter"?)

i try to mount both 10K pots and 100K pots on the joy, but nothing changed....

with the 100K pot the maximum resistance the pot is measuring is 11-12 KOhm...

any ideas???

[TK.]

> even a software "filter"?

The integrated ADC of the PIC doesn't support impedances > 10k, but you could increase the AIN deadband in the application (this setting can mostly be found in the main.asm file). Note that like with every filter, the AIN deadband reduces the resolution!

Best Regards, Thorsten.

[goule]

Hello Master  ;D

I have a touch potientiometer (like ribbon controler) from Spectrasymbol which seems to be 200 kOhms. This brings flickering when not touched (it's a pity because it works very well as long as you keep your finger on the ssurface).

Are you sure there is no other wy except from raising deadbandset ? (because loss of resolution leads to very poor controlers precision as you already know  ;)) : I have to fix deadbndset at approx. 100 for this ribbons "shuts up" when in IDLE.

Is there some electronic solution for that kind of problem, cause adaptability of potentiometers seems to be a very poopular question ... ??

Thanks for help people and forgive for bad english ...

Olivier ka Goule

[goule]

mmmm .... UP ?  ;D