> Any chance of a circuit posted somewhere? Even if it is just a
> photograph of a drawing on the back of a napkin :)
The schematic needs some cleanup. Also, I screwed up placement of a
couple of non-critical components on the audio input. Basically,
imagine an SR1 simplex repeater with humidity (HTF3000LF) and
temperature/barometric pressure (BMP085) sensors.
> Anyway, how closely do these characteristics match the sensors that you
> are using, or could the firmware allow for 'calibration' / 'scaling' of
> inputs in the future so things read reasonably correctly?
Not very close, but *eventually* I want to add the ability to use some
different sensors and specify transfer functions. That's not anywhere
near the top of the list right now, though.
> As an aside, watch out for Hams running a kilowatt or so of HF near the
> sensors - the leads can pick up lots of induced voltage as you might
> guess & you really need heavy duty low pass filtering to keep that lot
> from reaching the uP inputs & screwing with the readings.
> (Nearby lightning flashes can play havoc too...)
Wrapping the cables around the antenna of a 5-watt HT doesn't seem to
cause any trouble, at least.
> Anyway, hopefully the sensors I have access to are compatible, or can be
> made to be.
Rain and anemometer would be pretty simple to adjust, but the wind vane
would require different code (not very much) for the proportional output
instead of discrete switches.
Scott
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/tracker2/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/tracker2/join
(Yahoo! ID required)
<*> To change settings via email:
[email protected]
[email protected]
<*> To unsubscribe from this group, send an email to:
[email protected]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
