/members-area/personalblogs/b/blog/posts/mcu-controlled-buck-regulatorIf you need some simple regulated power supply, you can build it using MCU and few external components: PWM frequency 250kHz for max. output curent 500mA and supply voltage 12V with 100uH coil. Output voltage regulated from 0.3 to +SUPPLY-0.7V @Io=200en-USTelligent Community 12