a Power Supply with Short Circuit Protection that Automatically turn Off when Shorted and automatic resumes its function if not shorted without using any switches. thus anyone know how to build this? or do you have any idea how to build it?
This function is built in to almost any commercially available laboratory power supply as well as most other supplies. Most simply, the voltage generated by a current sensing resistor is fed back to the regulating circuit and will shut it down if the current is too high (this generally is designed to provide current limiting as well as short circuit protection). Look at the schematic of any lab power supply or search on Short Circuit Protection for more details.