QUOTE(stormer.lyn @ Nov 13 2024, 08:02 AM)
Yup, your connection looks correct. Just to point out that the motor used in the YT video is this

And your speed controller can be one without reversing function. If the direction is not correct, just reverse the wires at the motor. Brushed DC motors change direction when you change the polarity of the wires.

Both of these save a bit of moolah over what you have in your diagram
QUOTE(lj0000 @ Nov 13 2024, 08:44 AM)
thank you both so much for the guidance
i feel that the original stock motor is 6mm in diameter? the one i bought from shopee has 6mm in diameter
from the below YT video is from minute 14:45 he started to show the stock motor head/connector from the original marble run set say the head is too loose xD
thank you for pointing out the motor used in the YT is from the shopee link which i see is 4mm, hmm cannot really test till i go back to my condo and get the marble set run xD
hopefully it fits else i will have to buy brass coupling shaft connector from 6mm to whichever mm the head size is
https://www.youtube.com/watch?app=desktop&v=ekYurKS_NXA
manage to make it works, the pwm shows RED color indicator when power on, should be ok right, no need to have green light to be safe? xD
any keywords to search for or possible diy kind of thing to buy from shopee to house the pwm + motor + on off switch cos seems too bulky and messy to carry around without a "housing for them"
This post has been edited by kueks: Nov 13 2024, 11:54 PM