On Sun, 28 Jun 1998 01:16:32 -0400, you wrote: >Greetings everyone, > >I'm working on a hobby project using a 12C508 to turn on and off the lights >on a model train locomotive. The locomotive has an ID ( 1 ~ 80 ) on the >track. The decoder circuit based around the 12C508 needs to have ID >selection switches by which I can assign the decoder an ID. > > >Am I wasting my time with the 12C508 chip here and should just use a 16F84? >Does anyone know when the 12CE518 chip would be available? With that (and >also with the 16F84) I could write a routine to actually program and store >the decoders ID in the EEPROM by using a key sequence on the central >control unit. If you are deterred from using an external eeprom for space reasons, remember that you can now get a very cheap eeprom in a SOT23-5 package (24C00) from Microchip. ____ ____ _/ L_/ Mike Harrison / White Wing Logic / wwl@netcomuk.co.uk _/ L_/ _/ W_/ Hardware & Software design / PCB Design / Consultancy _/ W_/ /_W_/ Industrial / Computer Peripherals / Hazardous Area /_W_/