Just a simple linear regulator with winding switching to increase the efficiency when using low voltages at high current. The design is pretty preliminary since i got no workspace to make a good one, but it still works. So the idea is to switch the windings at ±14V (with a slight hysteresis of course). You can clearly see the switching at 14V. After it switches you can play with the potentiometer and check around the switching point up close. Anyway if you have any questions don't hesitate to add them in the comments.
