I just started using arduino and I already have problems (it goes together i guess). I need it for a specific project, I need a movement like 180°(left) - 0° (middle) - 180° (right), the thing I need to move is a bit heavy so I got a servo with metal gears (RCD-645mgb), after trying a lot of different codes (sweep, microseconds,etc) without any success (the movement is ok but not wide enough) I realised this servo could only go 120°. I found out it was possible to "hack" it (soldering resistors instead of the potentiometer and getting rid of the small piece that restrict the movement), i did but probably badly, I didn't have result with the resistors but when i connect another potentiometer i get a continuous rotation in one direction, regardless of the code I send to the board. I've decided to give up trying to fix something I don't have the knowledge to fix because I don't have time, so I think it's easier for now if I just get a new servo that can do the job without any modification. So my question is : where can I find such a servo ? How can I be sure it can go 360° ?
Thank you for reading and thanks in advance for advices!