Hello again Eric and Mikebits!
Sorry by the delay, my job is killing all my electronics time
Thank you by your suggestion Eric, but I'm afraid it gets too expensive vs. benefit. Each latch consumes 2 pins of the decoder, so I'm gonna need a lot of cascaded decoders and latches to control a respectable ammount of devices.
I'm been studing the diagram of my 20th june post, about cascading the decoders. I understand more decoders means more A. B, C inputs, and the free pin of the second decoder is used to feed an eventual third decoder, and so on. But I cannot figure out yet.
I have found an interesting dual flip flop circuit, but multipling it times x numer of decoders, no way (even using a hex 74LS174 flip flop, stills require too much adtional components) Anyway I leave it here if anyone could find it useful.
About the LM35 interface through MCP3202, I'm very interested on it, but I don't wanna be rude (like the newbies that invade the site) asking you to do my work, so if you would like to share some clues to make my own schematic, I'll be grateful
Thank you by the EPP idea Mikebits, I'll read more about it, I would use it as a B plan if the decoder idea sinks.
edit: I found the MCP3202 datasheet! I was mispelling the name... but no typical aplication or test circuit