I've been going to college to get my mechatronics degree and haven't devoted any time to this project. It is however, forefront in my mind. I have gained a lot of new knowledge of basics: designing a PCB, having the PCB manufactured, build the PCB, new soldering techniques, testing and use of said PCB. I am currently taking classes for AutoCAD and Solidworks, and they have helped immensely. I taught myself Fusion 360 for the purpose of designing my pcbs and ill keep using Fusion 360 to make future PCBs. I think I have a better understanding of what I what to do, what I can do and what I still need to learn. 

I want to design a PCB that takes the 5 wires of the "toy servo" and convert it to standard servo wiring with motor drivers, a comparator and whatever else it needs for each motor so that it can be plugged into a servo controller hat for the Raspberry pi 4. I just need to know what ICs ill need to get for all of that and jump into fusion and design the PCB. I dont know if anyone is gonna even read this but if anyone has suggestions on what i would need, feel free to shout it out. 

thank you.