bypassing a potenciometer

hi guys,

I have a problem..

I'm trying to use arduino as substitution of the human input in my rc controller.. but it seems that is doing it by impulse (is not constant).

I'm using pwm with a bc547c transistor a 1k resistor for pwm impulse an nothing else.

i0m wondering if i have to put a RC circuit... but if its true, where?

IMG_20170202_123137_resized_20170202_123836796[1691].jpg|2080x1168

Some details, perhaps?

there is

(deleted)

low pass filter where?, i have to apologise for so short talk but i have a arm hang on my chest and i cant write as well as i wish. did you understood my design?

(deleted)

I Ddn't understood what your saying man..

(deleted)

okok, i know thefilter, but where i put it? in the base leg of the transistor? i love doing and getting every thing by me! but now i'm lost...