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phil_crump_buoys

Planned Sea Buoys

Prototype 1

  • 1x Atmega328 (??)
  • 1x RFM69HW (??)
  • 1x uBlox Pico Breakout (£23.99)
  • 1x DS18B20 Temperature Sensor (??)
  • 1x 3.3V LDO? (low quiescent required)
  • 1x Asda 400ml Beaker (£1)
  • 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