BlackBox four pin power connector pin out. If you placed the BlackBox so that the power connector is at the left side, pointing away from you, with the PBI connector toward you (as on most pictures), the pins are, from left to right: 1) -5 or -12 VDC (Bob Puff told me it can be either since it's only used as a reference.) 2) +12 VDC 3) Ground 4) +5 VDC -------------------- Lee's older seven pin BlackBox power suppy... 1) -5 or -12 VDC 2) nc (no connection to anything, even other nc pins) 3) +12 VDC 4) nc 5) Ground 6) nc 7) +5 VDC All seven pins are spaced .100 inches apart. Lee's original power supply states +5 VDC at 750 ma +12 VDC at 150 ma -12 VDC at 150 ma Lee thinks that http://www.jameco.com part number 265295 with +5 VDC at 1000 ma +12 VDC at 310ma -12 VDC at 310 ma for $9.69 should work fine. This Jameco power supply is categorized as 'table top' meaning that it has a 6 foot power cord and does not 'hang' from the wall socket like so many cheaper wall mounted types do. At Lee's place, all table top power supplies do their business sitting on the floor already, that way they don't have very far to fall and break apart from their own weight. Please note, that the above mentioned price was valid at the time Lee wrote it. It might no longer be. It should also be noted that Lee lives in the U.S.A. and therefore uses power supplies that work with a voltage of 115 Volts and a frequency of 60 Hz. If the power in your country uses a different voltage and/or frequency, you can NOT use the above mentioned power supply. If you have no clue what power supply to buy, print out this text and show it to a salesperson who knows how solderfumes smell. (S)he'll know what you need.