I have two questions regarding my first design - a simple speed/direction controller for a small (24V, 0.7A) stepper motor.
How it works:
12V from DC plug is converted to 5V to power Atmega and a4988 (driver) and to 24V to power motor. Atmega controlls stepper speed and direction by reading two user inputs: 3-pos rotary switch (CW, Off, CCW) and 10k potentiometer (speed control).
- are decoupling capacitors ok? anything is missing?
- I'm aiming at EMC compliance in the near future, what other obvious things I should consider at this stage? (my next question will be about PCB design but first things first)