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AUAV3 basic connections 2013
AUAV3 Installation and Basic Connections
SPECIAL THANKS TO PHILLIP KOCMOUD, MARK WHITEHORN AND
ROBERT DICKENSON
A/ BASIC CONNECTIONS
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AUAV3 basic connections 2013
Some additional connector pictures could be found at the end of this manual.
The first connector, situated in the middle top is the ICSP for programming.
URGENT ! PIN 1 OF THE ICSP CONNECTOR MUST BE
CONNECTED TO PIN 1 OF THE PROGRAMMER ( PICkit3 ).
1. INPUT CONNECTORS
There are 4 x 3pin, 2.54mm. input male connectors ( in the middle of the fron side of the
board ) for connection to the receiver. Their order is as follow :
INPUT1 +5V GND
INPUT2 RSSI GND
INPUT3 INPUT4 INPUT5
INPUT6 INPUT7 INPUT8
The RSSI input has a 1:1 resistor divider as the input Vmax for the analog inputs is 3.3V.
The connector situated under the inputs is the SPI3 connector with it’s signals – SS3 SCK3
+5V , SDI3 SDO3 GND. This could be used for any external SPI device.
2. THERE IS A GROUP OF 3 VERY IMPORTANT CONNECTORS AT THE
BOTTOM RIGHT
FIRST OF THEM IS THE POWER-CURRENT SENSE-BATTERY VOLTAGE
CONNECTOR:
CSU (BATTERY VOLTAGE) – measured battery voltage from the ACSP1
CSI (CURRENT SENSING) – measured current from the ACSP1
5PWR (5V POWER SUPPLY) – 5V DC power from the ACSP1
GND
Battery voltage sensing and current sensing have 1:1 resistor dividers. Also there is
additional voltage 3:1 divider over the ACSP1 ( current and voltage sensor board + 5V3A
DC-DC Buck regulator ). Thus, voltages up to 4S could be measured. The current sensor of
the ACSP1 can measure currents up to 90A.
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AUAV3 basic connections 2013
THE SECOND CONNECTOR IS THE ADDITIONAL POWER SUPPLY
CONNECTOR AND BACKUP BATTERY.
GND
UPS – uninterruptable power source from an external battery as 1S Li-Po or 2x NiCd/NiMH.
This could be used as an external second battery for emergency backup.
5PWR (5V POWER SUPPLY) – 5V DC power supply if not using the ACSP1. Could be a 5V
BEC.
GND
THE THIRD CONNECTOR IS THE I2C1 INTERFACE FOR USING WITH
EXTERNAL I2C DEVICES.
PLEASE NOTE, THE I2C1 CLOCK AND DATA ARE 5V TOLERANT,
WHICH MEANS YOU COULD CONNECT EITHER 5V I2C EXTERNAL
DEVICES OR 3.3V I2C EXTERNAL DEVICES.
WHEN CONNECTING 3.3V I2C DEVICES, PLEASE PAY ATTENTION
THAT THE SUPPLIED VOLTAGE IS +5V, WHICH MEANS THE
EXTERNAL DEVICE SHOULD HAVE IT’S OWN 3.3V VOLTAGE
REGULATOR.
SCL1 – I2C1 clock
SDA1 – I2C1 data
+5V for the external devices with 250mA load current capabilities.
GND
3. THE THIRD GROUP OF CONNECTORS, SITUATED ABOVE THE INPUTS
This group consists of 3 connectors for UARTs, where 2 of them are totally optoisolated
and one is not.
THE FIRST CONNECTOR IS THE NONISOLATED PORT3 ( UART3 ):
/ … this is a general purpose UART /
PORT3_TxD – PORT3 transmit data
( UART3 TxD )
/ OUTPUT /
PORT3_RxD – PORT3 received data ( UART3 RxD ) / INPUT /
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AUAV3 basic connections 2013
+5V is the 5V power for the external devices with 250mA load current capabilities
GND
THE SECOND CONNECTOR IS THE FIRST OPTOISOLATED UART – PORT1
/ … this could be the Telemetry UART for example /
PORT1_Vdd – optoisolated PORT1 ( UART1 ) Vdd – supplied from the external device and
should be in the range between +3.3 and 5V
PORT1_TxD – optoisolated PORT1 transmit data ( UART1
TxD )
/ OUTPUT /
PORT1_RxD – optoisolated PORT1 received data ( UART1
RxD)
/ INPUT /
PORT1_Vss – optoisolated PORT1
Vss – supplied from the external device and
should be connected to the externally supplied GND
( UART1 )
THE THIRD CONNECTOR IS THE SECOND OPTOISOLATED UART – PORT2
/ … this could be the OSD UART for example /
PORT2_Vdd – optoisolated PORT2 ( UART2 ) Vdd – supplied from the external device and
should be in the range between +3.3 and 5V
PORT2_TxD – optoisolated PORT2 transmit data ( UART2 TxD ) / OUTPUT /
PORT2_RxD – optoisolated PORT2 received data ( UART2 TxD ) / INPUT /
PORT2_Vss – optoisolated PORT2
Vss – supplied from the external device and
should be connected to the externally supplied GND
( UART2 )
The optoisolators used are FOD8012.
4. THE OUTPUT SERVO CONNECTORS
The group of servo connectors are situated in the middle left side on the picture. There are 8
servo outputs. Please note that the servo power is disconnected from the main 5V power by a
solder blob under the USB connector. The explanations for powering the servos and using
this solder blob are explained below.
GND
Vservo
S8 – servo 8
GND
Vservo
S7 – servo 7
GND
Vservo
S6 – servo 6
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AUAV3 basic connections 2013
GND
Vservo
S5 – servo 5
GND
Vservo
S4 – servo 4
GND
Vservo
S3 – servo 3
GND
Vservo
S2 – servo 2
GND
Vservo
S1 – servo 1
PLEASE DO READ CAREFULLY THE SERVO POWER
EXPLANATIONS BELOW ( section B )!
5. THE CONNECTOR ABOVE THE SERVO CONNECTORS
The connector above servo connectors is the ANALOG INPUTS connector. There are 4
analog inputs as follow:
A2
A0
A1
GND +5V A3
Please note all analog inputs have 1:1 resistor dividers + 10nF filter capacitors. The
maximum measured voltage can be +6.6V. If you need to measure higher voltages, please do
connect an appropriate resistor in series with the input used.
6. THE CONNECTORS UNDER THE SERVO OUTPUTS
There are 3 connectors under the servo outputs as follow:
THE LEFTMOST CONNECTOR IS THE CAN INTERFACE
CANH – CAN bus line high
CANL – CAN bus line low
+5V is the 5V power for the external CAN devices with 250mA load current capabilities
GND
Please note there is an integrated CAN transceiver MAX3051 on the board.
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AUAV3 basic connections 2013
THE SECOND CONNECTOR IS THE PORT4 CONNECTOR ( GPS for example )
PORT4_TxD – PORT4 transmit data
( UART4 TxD )
/ OUTPUT /
PORT4_RxD – PORT4 received data ( UART4 RxD ) / INPUT /
+5V is the 5V power for the external devices with 250mA load current capabilities
GND
PLEASE NOTE, THE PORT4 TxD and RxD ARE 3.3V COMPATTIBLE.
THE THIRD CONNECTOR IS THE GENERAL PURPOSE DIGITAL I/O
CONNECTOR
DIG0 – the digital I/O bus 0
DIG1 – the digital I/O bus 1
DIG2 – the digital I/O bus 2
GND
PLEASE NOTE THAT THE DIGITAL I/Os ARE NOT 5V TOLERANT,
BUT 3.3V, WHICH MEANS IF YOU LIKE TO USE THEM WITH 5V OR
HIGHER VOLTAGE POWERED DEVICES, YOU MUST USE
RESISTOR DIVIDERS.
7. THE USB CONNECTOR
There is a miniUSB connector onboard for bootloading and other future use.
B/ POWERING THE BOARD AND USING THE SERVO POWER SOLDER BLOB
1. SEPARATED POWERING
BY DEFAULT THE BOARD SHOULD BE POWERED BY THE ACSP1 ( CURRENT-VOLTAGE
SENSOR WITH 5V3A DC-DC BUCK ), WHILE THE SERVOS MUST BE POWERED
SEPARATELY.
IMPORTANT ! DO NOT POWER THE SERVOS FROM THE ACSP1 !
SEE THE EXPLANATIONS BELOW.
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AUAV3 basic connections 2013
As you could see from the pictures, you have a BATTERY IN and BATTERY OUT sides.
BAT-IN and GND is the connection to the battery, while BAT-OUT and GND is the
connection to the ESC. You have also a 4x1 2.54mm connector – GND / +5V3A / I / V. The
signals are as follow:
GND – the GND to the AUAV3;
+5V 3A - is the output from the DC-DC Buck for powering the AUAV3;
I – is the current output from the current sensor. The full range span is 5V;
U – is the voltage output from the ACSP1 for measuring the battery voltage. Range span is
5V.
IF YOU DECIDE TO COVER THE ACSP1 WITH A HEAT
SHRINKABLE TUBE, DO NOT LOAD IT WITH A CURRENT HIGHER
THAN 2A!
If you prefer the separated powering, you can power the servos with higher voltages,
BUT !!!
a/ The solder blob under the USB must NOT be soldered !
b/ The board should be powered either by ACSP1 or by any other 5V BEC;
c/ The middle ( power ) servo cable should NOT be disconnected neither from any
servo nor from the ESC. In this case, they have just a common GND.
Example: If you have 2S battery for servos ( 7.4V ), then DO NOT solder the blob
under the USB and just connect the 2S battery (+) cable to the middle pin of the servo
connector and (-) to the GND pin of the servo connector over the board. You could use
any of the servo connectors for the purpose.
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AUAV3 basic connections 2013
2. POWERING THE BOARD FROM THE SERVO SIDE ONLY
YOU COULD ALSO POWER THE BOARD WITH AN ESC OR BEC VIA A SERVO
CONNECTOR.
WHEN POWERING THE BOARD THUS WAY, PLEASE DO NOT
POWER IT AGAIN FROM THE FRONT POWER CONNECTORS AND
DO SOLDER THE SOLDER BLOB UNDER THE USB CONNECTOR.
PLEASE NOTE THAT THE ESC/BEC MUST BE 5V.
WHEN POWERING THE BOARD FROM A SERVO CONNECTOR, DO
NOT USE HIGH VOLTAGE ESCS/BECS, BUT 5V ONES, BECAUSE
THE PERIPHERAL 5V DEVICES ARE POWERED FROM THE SAME
5V POWER SOURCE!
HIGH VOLTAGE ESC/BEC WILL DAMAGE THE PERIPHERAL
DEVICES AND THE LOW DROPOUT VOLTAGE REGULATOR!
C/ USING A BATTERY BACKUP
AUAV3 offers the possibility of using an additional battery backup. To use this feature, you
can use an additional 1S LiPo or 4xNiCd/NiMH battery. Connect it to the UPS connector
thus way – (BAT +) to the UPS connector pin and (BAT-) to the GND pin.
NOTE, THE EXTERNAL ADDITIONAL BATTERY VOLTAGE MUST
BE <= 5V!
D/ MAGMETOMETER ( COMPASS ) ENABLE
On the backside of the board you can see a solder blob with a label MAGEN. This solder
blob enables the onboard HMC5883 compass. If you like to use it, just solder the blob.
F/ SOME ADDITIONAL CONNECTOR PICTURES
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AUAV3 basic connections 2013
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