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. | + | |
+ | = Power inputs = | ||
+ | |||
+ | The [[HiRel/CanSat|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 [[HiRel/CanSat/Slave_Gumstix|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. | ||
+ | |||
+ | [[File:Cansat-power.svg|center]] | ||
+ | |||
+ | 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 [[HiRel/CanSat/Slave_Power|power supply board]] for generating the 3.3 V | ||
+ | * the [[HiRel/CanSat/Slave_Sensors|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 [[HiRel/CanSat/Slave_Sensors|sensors board]] | ||
+ | |||
+ | [[Category:Master]] [[Category:HiRel]] [[Category:CanSat]] |
Revision as of 15:41, 23 December 2014
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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.
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