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 | ||
+ | |- | ||
+ | ! CanSat Slave Power || Schematic || Description | ||
+ | |- | ||
+ | | [[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 | ||
+ | |- | ||
+ | |} | ||
+ | |||
+ | It additionally provides a [http://www.ftdichip.com/Products/ICs/FT232R.htm serial port over USB], 4 switches and 2 LEDs. | ||
+ | |||
+ | = Power inputs = | ||
+ | |||
+ | The [[HiRel/CanSat|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 [[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 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 [[HiRel/CanSat/Master_FPGA|FPGA]] | ||
+ | * the [[HiRel/CanSat/Slave_XBee|XBee module]] | ||
+ | * the humidity sensor on the [[HiRel/CanSat/Slave_Sensors|sensors board]] | ||
+ | |||
+ | = 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: | ||
+ | {| class="wikitable" style="margin: 0 auto" | ||
+ | |+ 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 = | ||
+ | |||
+ | {|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 | ||
+ | |- | ||
+ | |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 | ||
+ | |} | ||
+ | |||
+ | [[Category:Master]] [[Category:HiRel]] [[Category:CanSat]] |
Latest revision as of 16:22, 5 April 2017
|
This board powers the CanSat system either from a battery or from an USB connector.
CanSat Slave Power | Schematic | Description |
---|---|---|
![]() |
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.
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 module
- the humidity sensor on the sensors board
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:
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 |