We’ve all seen those cheap bench power supply units (PSUs) for sale online, promising specifications that would cost at least a hundred dollars or more if it were a name brand model. Just ...

Replacing the front panel push-button switch with a 555 chip & relay New pcb for the CC modification. Single variable output 0-30VDC 0-3A Bench Power Supply #CSI3003X-5 Single variable output 0 ...