Just so you know, there is a forum specifically reserved for schematics of all sorts, preferably working schematics.


My favorite helper compopnents are:

- the MCP23016 16-Bit I2C I/O Expander, great when you don't have a lot of I-O pins.
- the MCT6 High Density PhotoTransistor Optically Coupled Isolators ('cause I got a ton off eBay).
- the AT24C1024 2-wire Serial EEPROM (same reason).

and then just about every other thingy you can imagine in no particular order.