If you're wondering about the power supply and how to build it, please see my earlier posts when I built the first clone.  I am using the same power suppy here to test the Mimeo-1.  Before stuffing the board I checked each voltage source and ground at each DIP.  I checked the big blue caps as well.  Everything looks good.  In this image, I have the scope set for 5 volts per div.  The card you see hanging off of the PCB is a card that I built for address line display (the red leds) and correct +5v regulated power at the J3 connector.  The card also has a reset button that can be used when no keyboard is attached.  The little green LED is lit, we are good to go.
Tuesday, May 25, 2010
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