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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This board powers the [[HiRel/CanSat|CanSat]] system either from a battery or from an USB connector.
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{|class=wikitable
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|-
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! CanSat Slave Power || Schematic || Description
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|-
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| [[File:CanSat_Slave_Power.jpg|200px|CanSat Slave Power V1.0]] || [[Media:P-CAD EDA - CanSat Slave Power schematic.pdf|CanSat Slave Power v2.0 Schematic PDF]] || LDO 5V -> 3V3: <br/> v1: SC189XSKTRT <br/>  v2: AP7361-FGE-7
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|-
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|}
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It additionally provides a [http://www.ftdichip.com/Products/ICs/FT232R.htm serial port over USB], 4 switches and 2 LEDs.
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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 micro-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&nbsp;V.
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Jumpers are provided in order to select the actual power source.
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This 5&nbsp;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&nbsp;V from 5&nbsp;V.
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The 3.3&nbsp;V is distributed to all the boards on the bottom connector disk.
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= Power usage =
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The 5&nbsp;V is used by:
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* the power supply board for generating the 3.3&nbsp;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&nbsp;V is given by the components' requirements:
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* the DC/DC converter needs 2.9&nbsp;V ÷ 5.5&nbsp;V
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* the Max11300 mixed-mode I/O interface needs 4.75&nbsp;V ÷ 5.25&nbsp;V
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* the pressure sensor needs 4.75&nbsp;V ÷ 5.25&nbsp;V
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* the temperature sensor needs 2.5&nbsp;V ÷ 5.5&nbsp;V
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The 3.3&nbsp;V is used by:
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* the [[HiRel/CanSat/Master_FPGA|FPGA]]
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* the [[HiRel/CanSat/Slave_XBee|XBee module]]
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* the humidity sensor on the [[HiRel/CanSat/Slave_Sensors|sensors board]]
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= Board connectors =
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Additionally to the Power supply, the power board provides:
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* 4 switches
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* 2 LEDs
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* a serial port
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The connection to the module is done through following pins:
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{| class="wikitable" style="margin: 0 auto"
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|+ XBee I/O connections
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! name !! pin !! dir !! description
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|-
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| TxD || b1 || out || serial link TxD
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|-
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| RxD || b3 || in || serial link RxD
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|-
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| Led_0 || b5 || in || user LED 0
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|-
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| Led_1 || b7 || in || user LED  1
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|-
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| switch_0 || b2 || out || DIL switch 0
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|-
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| switch_1 || b4 || out || DIL switch 1
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|-
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| switch_2 || b6 || out || DIL switch 2
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|-
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| switch_3 || b8 || out || DIL switch 3
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|}
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= BOM =
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{|class=wikitable
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|-
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! Device ||DigiKey Part No ||Description ||Quantity
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|-
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|10104111-0001LF ||609-4053-1-ND ||GDH04S04 SWITCH DIP HALF PITCH 4POS 24V ||1
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|-
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|1571983-5 ||450-1762-1-ND ||FTDI IC USB FS SERIAL UART 28-SSOP ||1
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|-
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|AP7361-FGE-7 ||AP7361-FGE-7DICT-ND ||DC-DC 5->3.3 ADJ ||1
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|-
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|GRM21BR60J106ME19L || ||CAP CER 10uF 6.3V 20% X5R 0805 ||1
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|-
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|08056D475KAT2A ||478-1416-1-ND ||CAP 4.7uF 10% X5R 0805 ||1
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|-
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|||||Resistance 0603 75k ||1
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|-
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|||||Resistance 0603 24k ||1
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|-
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|||||Resistance 0603 100 ||5
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|-
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|||||LED 0603 green 2V2 15mA ||5
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|-
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|GDS04S04 / 1825006-8 ||450-2162-ND ||SWITCH DIP SLIDE 4POS SMD || 1
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|}
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[[Category:Master]] [[Category:HiRel]] [[Category:CanSat]]

Latest revision as of 16:22, 5 April 2017

Contents

This board powers the CanSat system either from a battery or from an USB connector.

CanSat Slave Power Schematic Description
CanSat Slave Power V1.0 CanSat Slave Power v2.0 Schematic PDF LDO 5V -> 3V3:
v1: SC189XSKTRT
v2: AP7361-FGE-7

It additionally provides a serial port over USB, 4 switches and 2 LEDs.

Power inputs

The CanSat system has 3 possible power sources:

  • a micro-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:

Board connectors

Additionally to the Power supply, the power board provides:

  • 4 switches
  • 2 LEDs
  • a serial port

The connection to the module is done through following pins:

XBee I/O connections
name pin dir description
TxD b1 out serial link TxD
RxD b3 in serial link RxD
Led_0 b5 in user LED 0
Led_1 b7 in user LED 1
switch_0 b2 out DIL switch 0
switch_1 b4 out DIL switch 1
switch_2 b6 out DIL switch 2
switch_3 b8 out DIL switch 3

BOM

Device DigiKey Part No Description Quantity
10104111-0001LF 609-4053-1-ND GDH04S04 SWITCH DIP HALF PITCH 4POS 24V 1
1571983-5 450-1762-1-ND FTDI IC USB FS SERIAL UART 28-SSOP 1
AP7361-FGE-7 AP7361-FGE-7DICT-ND DC-DC 5->3.3 ADJ 1
GRM21BR60J106ME19L CAP CER 10uF 6.3V 20% X5R 0805 1
08056D475KAT2A 478-1416-1-ND CAP 4.7uF 10% X5R 0805 1
Resistance 0603 75k 1
Resistance 0603 24k 1
Resistance 0603 100 5
LED 0603 green 2V2 15mA 5
GDS04S04 / 1825006-8 450-2162-ND SWITCH DIP SLIDE 4POS SMD 1
Retrieved from "https://wiki.hevs.ch/fsi/index.php5?title=HiRel/CanSat/Slave_Power&oldid=2085"
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