Pretty much every project I've done just lately has required me to test out some servos and experiment with their positions before they go into the assembly. I usually make a quick servo tester on ...

An Arduino is used to determine the servo’s current position versus the desired position, and it turns the motor accordingly with a BTS7960 motor driver.

To do this in Arduino/C code, a new intermediate position for the servo is specified for each main loop until it reaches the final position.

Servo moves smoothed - this could be an interesting one if you work with robotics. And it is flagged by the Arduino team.