①输出电压：范围1.0～＋12.0V，步进0.1V，纹波不大于10mV；②输出电流：100mA；③输出电压和电流值由数码管显示；④由“＋”、“－”两键分别控制输出电压步进增减；-① Output Voltage: range 1.0 ~+12.0 V, step 0.1V, the ripple is less than 10mV　② Output current: 100mA　③ output voltage and current values from the digital display　④ the " +" ," -"　2 key to control the output voltage step change, respectively