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?
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,