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phil_crump_buoys

{{ :wiki:philseabuoyconcept.png?200|}}
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: 2020/06/27 23:02 (external edit)

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