I do see where this "old" combination can be useful. The A4988 based boards can only do 2A max with a heatsink and fan, and it is difficult to put a heat sink on them. The L297 plus L298 makes a chopper driver that can do 2A easily, easily mountable on a large heat sink, and can be paralleled for more current. See page 7, fig 7. As I have four 3V 4A steppers, this is of interest to me. Also, if this is what someone has to work with... not everyone has the access or cash to just buy all new parts.https://www.sparkfun.com/datasheets/Robotics/L298_H_Bridge.pdf
well,can i use those parts but diffent model?
I am uncertain what you mean by "different model". BTW, if you are going to refer to a datasheet, it is good form to provide a link to that datasheet.
The parts will need to have the values given to them in the datasheet. Unfortunately for a beginner, the datasheet (page 8, fig
does not give voltage ratings or type for capacitors, or power ratings for resistors. Also unfortunately, it is not a complete schematic.
Fortunately, a lot of people have done the work already. If you Google for L297 L298 schematic, you may find what you are looking for. Unfortunately, I don't have more free time at the moment.