Jae-Eun (Esther) Lim


Senior in Mechanical Engineering

I am a Senior with a double major in Mechanical Engineering and Robotics. I am very passionate about building robots that can do cool stuff.


Whenever you're lost, the Pathfinder can find your way back!

@jaeeunl, @leehsu, @nguan

Smart Ball

Did your ball fly over the fence? Just command it to return back.

@jaeeunl, @leehsu, @acedillo, @camin


Tele-operated versus autonomous robot

@jaeeunl, @bwarwick, @xiaoruil, @acedillo, @camin

Smart Ball 17 Jan 2017, 11:41 p.m. EST
Monday: Figure out how to attach the spring system, trigger and pendulum. CAD parts that need to be laser cut. Tuesday: Laser/machine cut parts. Assemble individual parts. Start wiring Arduino and motors. Edit CAD for trigger (increase radius to increase spring’s compressed length).
Smart Ball 19 Jan 2017, 1:33 p.m. EST
Wednesday: Laser cut larger trigger. Hardware. Test the spring system.
Smart Ball 20 Jan 2017, 12:21 a.m. EST
Thursday: Attach the trigger and spring system inside the ball. Test runs. Connect to blue tooth. Issues: 1) Balsa is too weak for a spring base. 2) Spring support rods are too short they get stuck to the edge of the bottom cylinders as springs compress. Solutions: 1) Use acrylic spring base. 2) Elongate the bottom cylinders so that the rods are already inside the cylinder when uncompressed.
Smart Ball 20 Jan 2017, 12:58 p.m. EST
Friday: Assemble everything together!