以凌阳SPCE061A单片机为核心控制器，具有电流可预置、可步进调整、输出的电流信号和预置的电流信号可同时显示的数控直流电流源。系统主要包括：凌阳SPCE061A精简开发板、键盘与显示电路、压控恒流源电路、校正电路、电源电路-Ling Yang SPCE061A MCU as the core controller, a current can be preset, stepping adjustment, output current signal and the preset current signals at the same time display control DC current source. The system mainly includes: Ling Yang SPCE061A streamline development board, keyboard and display circuit, voltage controlled constant current source circuit, correction circuit, power supply circuit