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content:meshextender:prototyping_on_olinuxino [01/05/2013 06:45]
Paul Gardner-Stephen [Add Atheros 9k Wi-Fi for complete solution]
content:meshextender:prototyping_on_olinuxino [15/05/2013 15:48] (current)
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 Price is US$1.13 ea for 20 units or US$0.91 ea for 100 units. Price is US$1.13 ea for 20 units or US$0.91 ea for 100 units.
  
-Not sure about the efficiency of these regulators, however, as they may be linear regulators, and thus increase the effective power consumption of the AR7291 Wi-Fi module to effectively be that of the AR9271 5V version.+The efficiency of these regulators is not ideal, however, as they are linear regulators, and thus increase the effective power consumption of the AR7291 Wi-Fi module to effectively be that of the AR9271 5V version.  Basically they chop the 5V down to 3.3V and that 1.7V just goes out as heat. The end result is only 66% efficient, i.e., power consumption of the Wi-Fi module will effectively be 100/66 = 1.5x higher than it needs to be.
  
 +In that case, we might as well just use the AR7291 5V version, and get the extra Wi-Fi TX power, and reduce the complexity of the design a little.
 ===== Bill of Materials ===== ===== Bill of Materials =====
  

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