The documentation of K8055 describes how to change the gainfactor for analog input for values more then 1.
I would like to know how to change the gainfactor to a value between zero and one.
It is not possible to set the amplifier gain below 1 by changing the values of R8 and R9.
You have use trimpots RV1 and RV2 to get total gain less than 1.
Is the maximum analog input value still equal to 5V? Or can it be more than 5V when i use the trimpots RV1 and RV2 to get total gain less than 1.
Yes, in this case the input voltage can be higher than +5V.