Arduino based filling machine

Hello Good afternoon
I want to build a project in which i can enter value then the value i have put in the machine will fill that much grams only.
Note:- 1) The value can be changeable
2)The code and circuit diagram should be provided.
3) Most Important- NO pcbs should be used

Hope some body helpss

4 posts were merged into an existing topic: How can we define kilograms and grams in arduino?