HiRel/CanSat/Slave Power

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This board powers the [[HiRel/CanSat|CanSat]] system either from a battery or from an USB connector.
  
 
{|class=wikitable
 
{|class=wikitable
 
|-
 
|-
! Type || CanSat Slave Power || Schematic || Description
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! CanSat Slave Power || Schematic || Description
 
|-
 
|-
| V1.0 || [[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]] ||  
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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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It additionally provides a [http://www.ftdichip.com/Products/ICs/FT232R.htm serial port over USB], 4 switches and 2 LEDs.
  
 
= Power inputs =
 
= Power inputs =
  
 
The [[HiRel/CanSat|CanSat]] system has 3 possible power sources:
 
The [[HiRel/CanSat|CanSat]] system has 3 possible power sources:
* a mini-USB connector on the power supply board
+
* a micro-USB connector on the power supply board
 
* a battery 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]]
 
* a micro-USB connector on the [[HiRel/CanSat/Slave_Gumstix|microprocessor board]]
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* the [[HiRel/CanSat/Slave_XBee|XBee module]]
 
* the [[HiRel/CanSat/Slave_XBee|XBee module]]
 
* the humidity sensor on the [[HiRel/CanSat/Slave_Sensors|sensors board]]
 
* 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:
 +
* 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"
 +
|+ XBee I/O connections
 +
! name !! pin !! dir !! description
 +
|-
 +
| TxD || b1 || out || serial link TxD
 +
|-
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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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| switch_0 || b2 || out || DIL switch 0
 +
|-
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| switch_1 || b4 || out || DIL switch 1
 +
|-
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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 =
 +
 +
{|class=wikitable
 +
|-
 +
! 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
 +
|-
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|GRM21BR60J106ME19L || ||CAP CER 10uF 6.3V 20% X5R 0805 ||1
 +
|-
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|08056D475KAT2A ||478-1416-1-ND ||CAP 4.7uF 10% X5R 0805 ||1
 +
|-
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|||||Resistance 0603 75k ||1
 +
|-
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|||||Resistance 0603 24k ||1
 +
|-
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|||||Resistance 0603 100 ||5
 +
|-
 +
|||||LED 0603 green 2V2 15mA ||5
 +
|-
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|GDS04S04 / 1825006-8 ||450-2162-ND ||SWITCH DIP SLIDE 4POS SMD || 1
 +
|}
  
 
[[Category:Master]] [[Category:HiRel]] [[Category:CanSat]]
 
[[Category:Master]] [[Category:HiRel]] [[Category:CanSat]]

Latest revision as of 15:22, 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
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