*** this is my fist ible so be kind...

I'm going to show you how to make a eeprom reader to read and write to those 24lc00 eeproms embedded in the cat genie solution cartridges. I have seen the adrino versions of this but realistically this is WAY cheaper and, in my opinion, much easier.
Lets face it: once you empty the cartridge, the next step is to throw it away so why not do something useful with it!!

Step 1: where to begin?

You have a couple of options open to you at this point:
1) do you want to make a reader that looks nice or
2) do you just want to cram something together and make it work?

Either option you choose you will need:
-sani solution cartridge (duh!)
- preferably a desktop computer with a parallel port capable of ECP and EEP protocols (explained later)
- 2X BC337 NPN transistors
- 2X 2.2K resistors (or +/- 200ohm)
- 2X 4.7K resistors
- 1X 10K resistor
- 1X100nF capacitor (any non-electrolyte type will work)
- 1X PC parallel port stub (male or female depends on your computer)
- an old USB cable you can destroy
- various wire lengths
- (optional) 4X small springs (3-4mm diam, 5mm tall)

tools: wire strippers, low watt soldering gun (20W max), solder, super (or hot) glue,

<p>i am so techo dumb. i am sure these are so very easy to make if one was smart enough. my question is does anyone make these things. i would LOVE to buy one please!!! gene32@comcast.net </p><p>thank u</p>
Would anyone be interested in making one of these???? The instructions are great but Over my head!!! Thanks!
I could not get this to work until I created a file using a HEX editor. The file is imported into PonyProg. There are just 16 bytes of data but I had to repeat these same 16 bytes to build a file that was 2048 bytes in total size.<br><br>Example<br>00000000 01 01 01 3C 3C 3C 3C 3C 3C 08 08 08 21 21 21 FF<br>00000010 01 01 01 3C 3C 3C 3C 3C 3C 08 08 08 21 21 21 FF<br>00000020 01 01 01 3C 3C 3C 3C 3C 3C 08 08 08 21 21 21 FF<br>.................<br>.................<br>.................<br>000007F0 01 01 01 3C 3C 3C 3C 3C 3C 08 08 08 21 21 21 FF<br><br>This was very easy to do using a free editor called HxD
OK so here is my story, I tried this and was able to read the cartragesuccesfully, built on a greadboard in 10 minutes and&nbsp;it worked onfirst try (that's&nbsp;unusual)&nbsp;I see that I can use the utilityfillbuffer from Ponuprog to change the data but I have to modify line byline which is quite a long process, I can not read the file withnotepad. I tried to save as hex, then modify with notepad but when Iopen the file again in Ponyprog it is not good.<br />Anyone have any advice?
I am surprised to see no comments here, has anyone tried it? any succesful stories? any issues?
A very nice Instructable. Very well done. I'm the one that started this ball rollin' - and I have to say, your solution looks very doable. If I ever come up with another need for my arduino, I'll have to whip up one of these! Helpful hint: Your 'ible doesn't come up when I search for "CatGenie" (one word) you might want to add that as a keyword or change your title.
More information about the CatGenie and posible hacks in this <a rel="nofollow" href="http://www.uchobby.com/index.php/2009/02/01/hacking-a-cat-litter-box/">Article</a> at uChobby.<br/>

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