(11) DC Motor Problems: Examples 1-4 (Motors #5) - Prof Aaron Danner, EE and CE Dept, NUS
https://www.youtube.com/watch?v=iQpDBn9rIeM

(12) DC Motor Problems: Examples 7-10 (Motors #9) - Prof Aaron Danner, EE and CE Dept, NUS
https://www.youtube.com/watch?v=fRDLt-Lpkuw

(13) DC Motor Problems: Examples 5-6 (Motors #6) - Prof Aaron Danner, EE and CE Dept, NUS
https://www.youtube.com/watch?v=QMEumXn0uTk

(14) Torque constant and back-EMF constant - Prof Aaron Danner, EE and CE Dept, NUS
https://www.youtube.com/watch?v=9eUxWdtOrik

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(15) Misconceptions about Stepper Motors Explained - MachineDesign 2017feb18
https://www.machinedesign.com/motors-drives/article/21835161/misconceptions-about-stepper-motors-explained

(16) Step Motor Basics - GeckoDrive 2017nov03
https://www.geckodrive.com/support/step-motor-basics.html

(17) What is a chopper drive for a stepper motor? - Dantelle Collins, 2017aug11
https://www.linearmotiontips.com/what-is-a-chopper-drive-for-a-stepper-motor/

(18) Optimized Current Control Chopper Modes - Trinamic
https://www.trinamic.com/technology/motor-control-technology/chopper-modes/

(19) Trinamic spreadCycle & stealthChop technology for silent stepper motors explained - 2016nov30
https://www.youtube.com/watch?v=Q0sJlGh9WNY&t=18s