I am looking for a substitute part number for the RB_SCT-485 part that has been discontinued. Any information would be great.
TIA
Hi @dougbrown937 and welcome to our forum.
There are many other speed controllers sold by RobotShop and you can see these here:
https://www.robotshop.com/search?type=product&options[prefix]=last&options[unavailable_products]=last&q=Speed+Controller
Your choice depends on which motor you want to control and how?