On Thu, 07 Mar 2013 12:49:27 +1000, the renowned Adrian Jansen
wrote:
You are right, but seems like someone has solved the RF problems once
for each of the useful bands, then its a piece of cake to interface with
sensors and one end and display/alarm at the other.
For an example, the tyre pressure monitor systems at 433 MHz. 10 gram
package, including battery, you screw on a tyre valve. Monitors tyre
pressure and temperature for about 1-2 years of operation. Reports real
time, every minute or so, to in-car readout.
Frequently fails mechanically, causing loss of tire pressure, allows
tire shops to charge for a "rebuild kit" whenever they swap a tire,
requires a trip to the dealer (or specialized equipment/knowledge) to
replace, even with an OEM replacement part.. other than that, they're
just spiffy.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers:
http://www.speff.com