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phil_crump_buoys [2014/04/29 17:03]
craag [Prototype 1]
phil_crump_buoys [2014/04/29 17:56] (current)
craag Add pic
Line 1: Line 1:
 +{{ :​wiki:​philseabuoyconcept.png?​200|}}
 Planned Sea Buoys Planned Sea Buoys
  
 ====== Prototype 1 ====== ====== Prototype 1 ======
  
-  * 1x Atmega328 +  * 1x Atmega328 ​(??) 
-  * 1x RFM69HW+  * 1x RFM69HW ​(??)
   * 1x uBlox Pico Breakout (£23.99)   * 1x uBlox Pico Breakout (£23.99)
 +  * 1x DS18B20 Temperature Sensor (??)
 +  * 1x 3.3V LDO? (low quiescent required)
  
   * 1x Asda 400ml Beaker (£1)   * 1x Asda 400ml Beaker (£1)
  
   * 10x Asda Long Life AA Batteries (£3)   * 10x Asda Long Life AA Batteries (£3)
 +
 +===== Power =====
 +
 +Energy: 1.5V * 2Ah * 10 = 30Wh (Assuming regulator efficiency = 100% until known)
 +
 +==== Quiescent ====
 +
 +  * RFM69HW: 0.1uA
 +  * AVR: 5uA?
 +  * GPS: 0.1uA (disconnected Vcc, leave backup connected? - check kraken schematic to steal ideas)
 +  * LDO: 2uA?
 +
 +  * Total: 7uA (2 years)
 +
 +==== GPS Running in Power-Save ===
 +
 +  * RFM69HW: 0.1uA
 +  * AVR: 2mA?
 +  * GPS: 5mA
 +  * LDO: 2uA?
 +
 +  * Total: 7mA (54 days)
 +
phil_crump_buoys.txt · Last modified: 2014/04/29 17:56 by craag