What I did was to desolder D22 (which takes power from Data2) and transfer it to D24. This was a little bit of fussy soldering, but the diodes are big and mine seems to have taken the thermal abuse OK.
While the soldering iron was hot, I also installed the header for the serial port at J7.
Next I got a 6 inch "pigtail" of two conductors, soldered one end to the barrel jack that was so kindly provided with my board and the other end to J4. J4 is clearly marked. The three pins furthest from the board edge are all ground and the three pins nearest to the board edge are all 12 volts.
I dug a 12 volt, 1 amp "wall wart" out of my box of 12 volt warts, plugged it in and powered the board up!
Three green LED's come on immediately. One next to the ZYNQ chip (LED1), one next to the ethernet transformer, and one is on the "block" next to the RJ-45 connector. There is also a red LED on this block. It does not come on right away, but after a wait of 54 seconds it begins flashing at about 2 Hz.
That is it so far, but no smoke or fire, which is as much as we can ask without connecting the serial port.
Just for the record, being excited by the possibilities offered by the above, I dug around and found a Sony branded 8.4 volt 400 ma "wall wart". When I connected this to the EBAZ, nothing working and the supply was pulled down to 4.5 volts. Apparently significantly more than 400 mA is require for the EBAZ at 8.4 volts.
Meanwhile back to my Nintendo "Game Cube" supply that is rated at 12 volts and 3.25 amps and works just fine.
The other pleasant discovery is that if you have an old PC power supply laying around, the power connector will mate with the "molex" on the EBAZ board. I chopped the connector off of a power supply I had laying around and then cut it up to get 3 usable connectors. Two of them have all 6 pins and one has 4 pins. So you can save yourself the trouble on removing the molex connetor on the EBAZ unless you really want to.
So I took my fluke meter and measured the current draw as my board boots
and runs U-boot and a standalone project I coded up.
I measure 150 mA.
Now this is with one core doing not much at all and nothing going on in the PL. Another piece of information might come from the Zedboard. This is a different chip (the XC7Z020), but it runs off of 12 volts. The Zedboard is designed for 60 watts (12 volts, 5 amps), but this allows for a significant load via the FMC expansion board. My Zedboard came with a 12 volt, 3 amp supply which has been adequate for everything I have done.
The Zybo uses the same Zynq chip, but runs from a 5 volt supply. Digilent recommends at least 2.5 amps (12.5 watts). This suggests that a 12 volt 2 amp supply might do just fine for the Ebaz (it would supply 24 watts).
Tom's Computer Info / tom@mmto.org