Temperatur measurement

" snipped-for-privacy@gmail.com" wrote in news: snipped-for-privacy@k78g2000cwa.googlegroups.com:

Maybe encode the temperature as an audio frequency? LM331 can convert both ways, so two of those will do it. You can feed the audio signal directly into the processor, too, if the FM receiver keeps the amplitude steady. This might be the simplest way to avoid noise errors in your readings.

Kieth,

You measure an analog temperature..Convert it to a digital form. send that as data ovr wirless link. receiver presnets an 8-bit word represeting temprature...in some format. gain and scale set by application.

For simple data like "temperature" and the relatvie;y low bandwidth it would take to send say eight bits of temperature, every 1 - 10 seconds! So O/off or better ASK data keying would be the idealc andiate for this application, imho.

Marco Polo

LVMarc wrote in news:m53Ch.48015$ snipped-for-privacy@newsfe15.phx:

In what format? You'd have to prepare a complex structure, then repeat it over and over again to update the output. What could be simpler than an audio frequency to represnt it? If you endoded that frequency with pulse width, you'd have two channels of realtime info on a single signal. Unless the OP really needs more than that, why use more complexity that needed?