10th May
"Current State of the Union"
The DAC has been working perfectly generating the desired waveforms and has been disconnected to make way for FRAM driver development.
This is just a progress picture showing the current elements under development showing the FRAM connected to the Fraunchpad and the DAC placed beneath it.
The Relay driver board now has a National Semiconductor LM3940-3.3V linear regulator attached.
Although originally for a uA7805, I am driving the voltage regulation circuit in reverse to get 3.3v from a regulated 5v input.
Since everything in this area is working in reverse with inputs becoming outputs and outputs becoming inputs no PCB mods were necessary.
I annotated the voltage input and output pins to ensure that I would not connected them the wrong way around.
The 3.3v is used to power the Fraunchpad and connected 3.3v peripherals.