Project MEMS - January 2009 - (Page 13) feature Fig. 3. The FCC-certified MRF24J40MA RF transceiver module is said to save a significant amount of time and money in design WSN sensors. the MRF24J40MA FCC-certified RF transceiver module (see Fig. 3), which services the 2.4-GHz unlicensed ISM short-range wireless frequency band for the IEEE 802.15.4-based ZigBee or proprietary wireless-protocol systems. Designed for ultra-lowpower, low-data-rate applications, the miniscule surface-mount module which includes discrete biasing components and an integrated PCB antenna can be used with hundreds of 8-, 16-, and 32-bit PIC microcontrollers and is expected to save time and money by eliminating the need to get FCC certification for wireless sensor products that are based on it. The $8.99 ea / 1,000 module is supported by a demo kit and a wireless network analyzer, as well as free ZigBee, MiW and MiWi P2P (peer-to-peer) softwareprotocol stacks that are said to enable designers with little or no RF design experience to design low-power wireless networking products using the module quickly and inexpensively. Cymbet, a maker of thin-film solid-state batteries and ANT, creator of the ANT protocol for ultra-low-power 2.4-GHz networks, demonstrated an energy harvesting WSN that used Cymbet’s EnerChip module. The module can be used with various energy-harvesting devices, such as solar cells and motion transducers, to harvest power from the local environment. What make use of these components feasible for this application is the fact that the modules have a very fast charge time and very low self-discharge compared with Li-ion or supercapacitors, coupled with the fact that these devices can withstand over 5,000 recharge cycles and have a capacity of 12 to 85 μAh. where are we? Among the many types of sensors introduced at the show, several were concerned with position/location sensing. Project Contents Viewpoint MeMS SPonSor advertiSeMent Knowles mems mIcrophones AVAIlAble AT DIgI-Key From Digi-Key, Knowles’ MEMS (Micro Electro Mechanical System) technology platform brings small form factor product design possibilities and related cost advantages, including silicon-based, surface mount manufacturing. Traditional uses of silicon involve creating pathways for electricity within components such as integrated circuits. In contrast, MEMS transforms silicon into mechanically moving parts. During the past decade, this process has become useful in an increasing number of industries. Knowles’ research in MEMS led to the introduction of the world’s first surface mount microphone in 2001-02, the SiSonic™ series. Solutions for Testing MEMS Devices on the Wafer Level Wireless Sensor Networks Have Arrived Choosing the Right Material for RF Packaging Home Page Product Training Module Online Ordering Suppliers Catalog click here for additional inforMation 1 3 | P r o j E C T M E M S | vo L . 1 / N o . 1 http://www.cymbet.com http://ad.doubleclick.net/clk;210306059;32013581;o?http://www.digikey.com/ http://ad.doubleclick.net/clk;210306059;32013581;o?http://www.digikey.com/ http://ad.doubleclick.net/clk;210306136;32013581;k?http://digikey.com/PTM/PTMMaster.page?site=us&lang=en http://ad.doubleclick.net/clk;210306155;32013581;l?http://ordering.digikey.com/ordering/addpart.aspx?site=US&source=search http://ad.doubleclick.net/clk;210663609;32013581;v?http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&KeyWords=knowles mems microphone;stock=1 http://ad.doubleclick.net/clk;210306414;32013581;j?http://digikey.com/Suppliers/SupplierIndex.page?site=us&lang=en http://ad.doubleclick.net/clk;210306629;32013581;r?http://dkc1.digikey.com/us/en/pdf/Current.html
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