how do you store multiple values (i.e. a different value every second for up to an hour)??? And could these values be later accessed on a PC for further analysis???

 

The built-in EEPROM has many memory locations which can be accessed by the appropriate address. Start from the first memory location and move on to the next ones by determining the appropriate address. Check if the EEPROM is enough for all the values you need.

 

Internal eeprom doesn't exceed 250 bytes. If you need more then use 24xx eeprom memory chips.

These memory use I2C protocol (very easy to use) and you can have upto 2 Mbyte

See microchip site for more datails
Alberto

 

Internal eeprom doesn't exceed 256 bytes.

Not true. The ones I know of, the 18F2525/18F2620/18F4525/18F4620 all have 1024 bytes. There are probably others.

EDIT: Did a parametric search at Microchip. There are many.

No 16Fs exceed 256 bytes of EEPROM though. Only the 18Fs.

Of course the OP never said whether he was using PICs or something else, so all that could be worthless.

 

Futz, I was thinking to the 16F, but you are correct with 18F.
Nevertheless you seriously want to do a datalogger with only 1Kb of eeprom ?
Alberto

 

Nevertheless you seriously want to do a datalogger with only 1Kb of eeprom ?

Certainly not. At least not usually. That's where SD cards come in handy. So nice and simple to interface and code for. And dirt cheap!