With this thing it is possible to trick the fitness app of your smartphone. By rotating the smartphone, steps are imitated and perceived by the app. If you have set Adventure Sync in Pokemon Go, the " walked " distance is transferred to the game.
This project was designed more to see if it works and actually works well. Please don't abuse the thing and don't destroy the fun of the game.
Extra parts you will need
It is possible that you will have to rework the holes a little if the parts don't fit right away, because everything has to fit tightly and therefore has to be dimensioned very tightly.
For the assembly you have to insert the connector1 into the ball bearing. Then push the servomotor into the frame. Now push the ball bearing with the connector and a spacer ring into it so that the connector fits into the white thing of the servo motor.
Insert the second ball bearing on the opposite side and finally fix the mobile phone holder by inserting the second connector with spacer ring into the second ball bearing from behind.
Code for the Arduino:Github Link