HiRel/CanSat/Slave Power

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(Created page with "{{private}} {{TOC right}} The power board generates 3.3V from 5V. The 5V it either gets over it's Pmod connector or from it's own micro USB connector. The later case it also d...")
 
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The power board generates 3.3V from 5V. The 5V it either gets over it's Pmod connector or from it's own micro USB connector. The later case it also delivers the 5V over the Pmod connector. The USB connection is serialized and the RX/TX lines also put on the Pmod connector. In additoin there are 2 LEDs and 4 DIP switches on this board for debugging purposes.
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= Power inputs =
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The [[HiRel/CanSat|CanSat]] system has 3 possible power sources:
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* a mini-USB connector on the power supply board
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* a battery connector on the power supply board
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* a micro-USB connector on the [[HiRel/CanSat/Slave_Gumstix|microprocessor board]]
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Only one of these should power the system with 5 V.
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Jumpers are provided in order to select the actual power source.
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This 5 V is distributed to all the boards on the top connector disk.
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[[File:Cansat-power.svg|center]]
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The power board generates 3.3 V from 5 V.
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The 3.3 V is distributed to all the boards on the bottom connector disk.
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= Power usage =
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The 5 V is used by:
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* the [[HiRel/CanSat/Slave_Power|power supply board]] for generating the 3.3 V
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* the [[HiRel/CanSat/Slave_Sensors|sensors board]] for the Max11300 together with the temperature and pressure sensors
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The precision of the 5 V is given by the components' requirements:
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* the DC/DC converter needs 2.9 V ÷ 5.5 V
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* the Max11300 mixed-mode I/O interface needs 4.75 V ÷ 5.25 V
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* the pressure sensor needs 4.75 V ÷ 5.25 V
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* the temperature sensor needs 2.5 V ÷ 5.5 V
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The 3.3 V is used by:
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* the FPGA
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* the XBee board
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* the humidity sensor on the [[HiRel/CanSat/Slave_Sensors|sensors board]]
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[[Category:Master]] [[Category:HiRel]] [[Category:CanSat]]

Revision as of 15:41, 23 December 2014

Contents

Power inputs

The CanSat system has 3 possible power sources:

  • a mini-USB connector on the power supply board
  • a battery connector on the power supply board
  • a micro-USB connector on the microprocessor board

Only one of these should power the system with 5 V. Jumpers are provided in order to select the actual power source. This 5 V is distributed to all the boards on the top connector disk.

Cansat-power.svg

The power board generates 3.3 V from 5 V. The 3.3 V is distributed to all the boards on the bottom connector disk.

Power usage

The 5 V is used by:

  • the power supply board for generating the 3.3 V
  • the sensors board for the Max11300 together with the temperature and pressure sensors

The precision of the 5 V is given by the components' requirements:

  • the DC/DC converter needs 2.9 V ÷ 5.5 V
  • the Max11300 mixed-mode I/O interface needs 4.75 V ÷ 5.25 V
  • the pressure sensor needs 4.75 V ÷ 5.25 V
  • the temperature sensor needs 2.5 V ÷ 5.5 V

The 3.3 V is used by:

  • the FPGA
  • the XBee board
  • the humidity sensor on the sensors board
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