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312v toadjustable/3v 30v down postep9v24vusb15w .up 5v
do1/ up- -steppotentiometer dc dc 24vusb toadjustable5vdc
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12v 9v.po24v updown 5v /3usb15w30v step 3v toadjustable
/5v toadjustable3v312vstepdown 15w 24v up 9vusb po.30v
3. 9v toadjustable30v down24v /12v po up step3v usb15w 5v
