Tuesday, May 25, 2010
Initial Power applied to the A1-Mimeo before stuffing the board
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.
Posted by John at 12:12 AM