canmemo

I want to join this PSU project , maybe i can help you guys implement digital control unit. But I m not good as like you on analog part. Can you please tell me , why are we using u1d and M1 block ? and please tell what is the function on the circuit. If im not wrong , you measure current using R5 , but how can we found 15mR ? In your bill of metarial list , you said (150K and 10K in series) , but i guess these words for R6 (160K) . In a few words about my idea, I m thingking to use ATMEGA series for digital control unit , atmega8 is cheap and some versions works on 20 Mhz . i guess its enough the handle voltage and current control , and we can use (MCP 4922 ) for DAC, it has 12 bit resolution. Another hand, we can re-design VRef block , use LM4050 shunt voltage ref. IC for it. if we can able to change Vref value to 4.096 its best for calculation in MCU . but that time we need to change Opamp gain to get 30V from output I need your kindly response. Thanks.