Jack Crossfire's Blog – August 2008 Archive (2)

XBee price cut

The 2.4Ghz modules may be heading up to $36, but the cost of 900Mhz access will be going down in 2009. All the way down to $39 for a 900Mhz module which is upgraded to 115200 baud but range reduced to 1.8 miles.



http://www.digi.com/products/wireless/zigbee-mesh/xbee-digimesh-900.jsp

http://www.digi.com/products/wireless/point-multipoint/xbee-pro-900.jsp



It will be 5V tolerant on the UART pins, but you better keep those voltage dividers around until 2009. The $32 XBees… Continue

Added by Jack Crossfire on August 24, 2008 at 4:00am — 14 Comments

Thermal accelerometers R back

Spring mounted mass accelerometers truly do suck. Thermal accelerometers were once the standard & they're coming back now that everyone knows what high frequency vibration does to spring mounted masses.



It's China to the rescue again, as the thermal accelerometers from Memsic are being used in thousands of persistence of vision wands at the olympics. The wands can display any communist party approved message when waved by manual labor. There are no pictures of the wands except… Continue

Added by Jack Crossfire on August 12, 2008 at 12:00pm — No Comments

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