DIY USB Linear Voltage Regulator Multi-channel Output Power Supply Kit Step Up Dual PowerFeature:- Single voltage wide range input、 can connect to USB、 with input current limiting protection.- Multi-channel linear regulator dual output、 which to meet most of the experiments required- Small size、 easy to use- Input voltage: 5~18V DC- Output voltage: +12V、 -12V、 +5V、 -5V、 +3.3V、 +9V- Output current: max 300mA (per channel)Package incluede:1 x Multi-channel Output Power Supply KitThe input end connected to the 5V power adapter with USB cable、 then tested the output voltage:1. Output +9V 、and tested it、 the accuracy is high.2. Output +5V3. Output -5V4. Output -12V4. Output +12VDrived the 12V\/200mA fan with 5V\/1A mobile phone charger、 and worked normally.Used mobile phone charger whose output is 5V\/1A to supply +5V、 +12v、 -12V voltage to the DDS waveform generator、and it worked perfectly.