I want to produce (small scale) a simple device (0.5A stepper motor controlled by atmega and a498 with a potentiometer to regulate speed).
To simplify the whole process I'm using as many ready made modules as possible. A498 and Arduinos are simple - can be connected with "mother" pcb by headers, but I'm not sure about buck converters.
The ones I'm interested in do not have castellated vias, they have regular pads with vias (do they have a proper name?) at each corner of the module. How to connect them properly to other pcb? Can one just solder those IN, OUT pads to "mother" board?