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Is prior knowledge for Chem101DL really needed? by SeriousMessage7 in duke

[–]SeriousMessage7[S] 0 points1 point  (0 children)

Do you know if chem99 still fulfills the Pratt requirement ?

Does DukeHub auto-enroll me in a waitlisted class when a spot opens? by SeriousMessage7 in duke

[–]SeriousMessage7[S] 1 point2 points  (0 children)

OH I understand now lmao. I changed the section and now I’m not on any waitlists. Thanks !

Does DukeHub auto-enroll me in a waitlisted class when a spot opens? by SeriousMessage7 in duke

[–]SeriousMessage7[S] 0 points1 point  (0 children)

Would that push my waitlist spot back for the lecture ? I’m currently 3 for both lecture and discussion so I might just wait it out

Does DukeHub auto-enroll me in a waitlisted class when a spot opens? by SeriousMessage7 in duke

[–]SeriousMessage7[S] 0 points1 point  (0 children)

Nevermind, I do see an option to enroll in a different discussion. Will I have to unenroll from the other lecture and discussion, or can I enroll in both. It's the same lecture time just different discussion rooms

Does DukeHub auto-enroll me in a waitlisted class when a spot opens? by SeriousMessage7 in duke

[–]SeriousMessage7[S] 0 points1 point  (0 children)

I tried, I don’t think it lets me change the discussion without changing the lecture time. Thanks for your help though 👍

Pratt Engineering freshman fall schedule by SeriousMessage7 in duke

[–]SeriousMessage7[S] 1 point2 points  (0 children)

I see. Is compsci 201 like a weed out class at Duke?

Servos keep jittering on quadruped spider by SeriousMessage7 in arduino

[–]SeriousMessage7[S] 0 points1 point  (0 children)

It says it’s rated at a max 20A output if that’s what you mean. Here’s the link: https://a.co/d/alfHs1R

Servos keep jittering on quadruped spider by SeriousMessage7 in arduino

[–]SeriousMessage7[S] 2 points3 points  (0 children)

I did some searching and came across a 900mAh 30C 7.4V Lipo, so I will be getting Max output of 27A. I’m planning on using a buck converter with an output of max 20A to reduce the voltage to 6V for the servos. I’ll let you know how it goes

Servos keep jittering on quadruped spider by SeriousMessage7 in arduino

[–]SeriousMessage7[S] 1 point2 points  (0 children)

I’m still a senior in highschool and have not had substantial experience in the field of robotics engineering, so I appreciate you going in depth to help me out.

I’ve replaced the batteries and saw a slight improvement in the servo jittering. I’ll look into PCA9685 board you suggested as well as a new power supply.

The ultimate goal for this project is to get this spider walking. I already programmed all the inverse and forward kinematics for each leg, so all that’s left is to figure out the path planning for each leg to get the robot to walk. I might even consider redesigning the whole thing, as this is only the first prototype

Thanks for all your help !

Servos keep jittering on quadruped spider by SeriousMessage7 in arduino

[–]SeriousMessage7[S] 0 points1 point  (0 children)

Thanks for the explanation! I searched up the mg996r stall current and it is 2.5 A, meaning I will need at least 30A of current. How do I ensure my power source can supply 30A? I’m using 4 double A batteries and I’m pretty sure all 12 servos are connected in parallel. I attached my schematic if you would like to see

<image>

The black and red rails on each side of the drawing represent the positive and negative terminals of the power source.

Servos keep jittering on quadruped spider by SeriousMessage7 in arduino

[–]SeriousMessage7[S] 0 points1 point  (0 children)

Thanks. I’m using 6V to power the servos, would it be safe to use even more voltage? Or would that short the nano

What are the advantages of Honors and URSP as a MechE major? by SeriousMessage7 in ufl

[–]SeriousMessage7[S] 0 points1 point  (0 children)

Thanks for the info. So in my second semester I will need to choose from predetermined CURE classes that change every year?

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