Project 1 - Water Quality Data Logger - Progress

A little bit of progress on the data logger project.  The first prototype circuit is constructed:

The rear breadboard is just the voltage regulator circuit.  It is a 1.5 amp smps buck converter with a 3.3v output.  It is way bigger than this application needs, and I'll use a smaller cheaper one for the final design, and probably use this one for a bench power supply.

The front breadboard has the 18F4550, 20mhz ceramic resonator, and a SD card socket.  The SD card socket is homemade from header pins following this instructable:
 Cheap-DIY-SD-card-breadboard-socket

For starters, I'm going to forgo adding any peripheral sensors, and put together a program code that saves a dummy sensor reading and time stamp to a text file on the SD card for every three second interval.  Once that is working, I'll start to add sensors.

I've decided to use microchip's Memory Disk Drive File System software library, rather than PetitFatFS, since it should be easier to port to my chip.


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