A better view of the board. This is a home-made two sided board...If there is alot of interest in the project when I am done, I will get some real boards made with plate through holes if I can get a group to go in. The cost for the board that way would be about $5-7 dollars, and you dont have to etch it yourself, or solder all the vias and through pins (==pain in the A@#).
And the moment you have been waiting for...something that actually does something.This shows the little board hooked up to the RS232 serial port on my laptop.
Finally, a little message of encouragement to keep peoples hopes up on the forum :)
One more thing, The board files I made DO use SMD reistors and Capacitors. This let me keep the board very small, and the parts are much cheaper like 4 cents each. HOWEVER, this is some much more dificult soldering than typical through hole parts. If there is interest, I will redo the board files with through hole resistors and capacitors..just let me know. OR, you can modify the schematic files with eagle and make your own board...it's pretty easy, have fun!
There is alot of work left to do, and this is only a tiny piece of the whole puzzle. I will continue to update this as things progress. Next up will be interfacing the Atmega16 chip to our display, and starting to work on some code to make our controller. Further on, I will hopefully have some help with interfacing the pH and ORP probes to the Atmega16. Stay tuned....GS
UPDATE 10/6/03:
The v1.1 files in the original zip contained an error in the schematic and the board files. The new files posted today
are correct. If you etched a board with v1.1 it's easy to fix...just remove resistor R9 and jump the solder pads to complete the trace.
UPDATE: 10/18/03:
Added some shots of the work in progress...just to let people know this project isn't forgotten :)