Re: XTB II Review

[Marc_F_Hult <MFHult@xxxxxxxxxxxxxxxxxxxxx>]

On Wed, 03 Jan 2007 03:10:56 GMT, nobody@xxxxxxxxxxxx (Dave Houston) wrote
in message  <459b1d21.9944265@xxxxxxxxxxxxx>:

>"Robert Green" <ROBERT_GREEN1963@xxxxxxxxx> wrote:
>
>>> http://www.rfsolutions.co.uk/acatalog/RF_Signal_Strength_Meter.html
>>
>>Only 49 pounds for thre 315MHz units.  Not sure what that comes to in
>>American money but I suspect it's outside my price range again.  I've
>>found some used meters on Ebay for cheap (under $50) but with very little
>>documentation it's hard to tell if they work in the proper frequency
>>range.
>
>It might be possible to build one for under $15 but I'm not sure how it
>might be affected by being handheld while searching for a transmitter.
>
>The RF receiver modules that I specified the BX24-AHT and roZetta have a
>linear output pin which can be used as a signal strength indicator. You
>would want an inefficient antenna, a battery and you might get buy with a
>multimeter as the readout. More likely you would need a PIC and an LED or
>some type of visual indicator.


An Oldie-But-Goodie  National LM3914 (linear output) or LM3915 (log) 10-LED
driver would fill the bill nicely (at only $2.50 or so).

... Marc
Marc_F_Hult
www.EControl.org