Progressing quite nicely on the controller project. I have had alot of interest expressed via email by several people. Many asked that I keep you up to date on the progress....well here ya go :)
First a shot of the now messy workbench. Alot of things going on on the breadboard now...I will explain a few of the additions.
There luckily is a method to the madness...this shot may not excite very many people...but it is very exciting to me. This is a working pH interface for the controller...that is my American Marine pH probe from my tank attached to Mbeldings working design for the interface. Now I just have to get the code done for the atmel chip to translate the voltage from the interface into a pH value...
A quick shot of an addition I was forced to make...darn that Mbelding...My cheap powersupply is a single output supply, and the design for the pH probe uses a +5v and -5v source...well with Marks help, I added a wallwart powersupply through a voltage regulator to provide the missing -5v to my power supply...
