Introduction - If you have any usage issues, please Google them yourself
design ATMEL the company's core AT90S8515 as the control, Implementation of output current digital control, clever use of a 4-channel 8-bit D/A converter chip core MAX505 conversion to complete 16 of conversion accuracy, D/A converter output voltage chip volume flow through a pressure converter transform into CURRENT output. Again through 12-bit A/D converter chip MAX197 feedback output data collection, output current form of closed-loop control, in order to achieve higher accuracy.