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Table of Contents
Overview
3
Firmware
4
Flight Controller
5
Radio Control
6
Failsafe
7
Motors, Props, ESCs
8
Side Plates
11
Battery
18
FPV System
19
Accessories
22
Specifications
23
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overview
…the next evolution of high performance racing drones
Impact resistant composite frame core
4mm carbon fiber booms
Fully integrated power and signal PCBs
24k gold plated connectors and bus bar
Seriously Dodo rev. 3a F3 flight controller
Runcam Swift FPV 600TL CCD camera
200mW RaceBand video transmitter w/ display
Integrated MinimOSD Micro
Race-spec 2205 2300kv hollow shaft motors
Flycolor 30A SiLabs F330 ESCs
Internal battery bay
14 programable RGB LEDs
12 high intensity solid red rear LEDs
Integrated Frsky XSR micro receiver connector
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Firmware
External Resources
Cleanflight Firmware & Configurator Software
http://cleanflight.com/
Betaflight Flight Control Firmware (installed in the AR25)
https://github.com/betaflight/betaflight
Betaflight Configurator
https://github.com/betaflight/betaflight-configurator
MW OSD Firmware & Configuration Software
http://www.mwosd.com/
BL Heli ESC Firmware & Configuration Software
https://blhelisuite.wordpress.com/
SiLabs Drivers for Flight Controller & ESCs
http://www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx
While drone racing is fast and exciting, this new
sport is not without its challenges. The only thing
faster than a racing drone are the advancements and
improvements to the software and firmware!
That being said, the AR25 comes fully configured
and tuned out of the box and should fly just fine for
most users. But for those looking to try to get the
most out of their hardware, these following resources
are worth exploring and studying in depth.
So to stay on top of the latest developments, keep
an eye on these sites listed here as well as
allieddrones.com for tutorials, support, and more.
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flight Controller
Seriously Dodo Rev 3a
8 input channels 8 output channels
3 UARTs (GPS, Telemetry, S.bus)
2-6s input power 30v MAX INPUT
5v output - 0.5A Max
STM32 F303 256k 2 megabyte blackbox storage
Barometer
Spektrum satellite port
MPU6050 accelerometer/gyro
5.4g
MicroUSB socket
WS2811-style LEDs pinout
Preconfigured with Betaflight firmware
We have fully integrated the best flight controller
currently on the market, the Seriously Dodo rev. 3a.
This is a new F3 generation of flight controllers
enables fast loop times and multiple UART ports.
The Dodo board interfaces with an AR25 flight
controller adapter board on the right side plate. This
adapter board allows for several additional
configurable solder pads to enable additional
advanced flight controller/RC features such as FC
OSD, Spektrum Rx, Frsky S.port, S.bus, and more.
The flight controller is pre-configured with Betaflight
and S.bus for the optional Frsky XSR receiver, as well
as the full set of 14 RGB LEDs.
The FC adapter board allows for future additional
flight controller integration.
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RADIO CONTROL
RC Transmitter & Mode Controls
The AR25 has been setup to work nativley with the
FrSky Taranis X9D Plus and XSR s.bus receiver. If you
purchased an ARF package from Allied Drones, then
your receiver has been setup as indicated:
SF - Disarm / Arm
SH - Off / Momentary Buzzer
SG - Mode (Angle - Horizon - Rate)
SD - Airmode Off / AirMode On
Failsafe - no pulse
Mode 2 stick configuration
“Home” position for all switches are forward/away
from the perspective of the pilot. Therefore, home
position would be; motors disarmed, buzzer off,
angle mode, airmode off.
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FAILSAFE
Failsafe Mode
In the event of a loss of radio control signal, both the
radio transmitter (if included) and the flight controller
have been set with basic failsafe mode functionality.
In the event of a lost link between the transmitter
and the RC receiver onboard the RC system is
configured to send “no pulses”. In turn, the flight
controller is configured for both Stage 1 and Stage 2
failsafes if it receives no pulses from the RC receiver.
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Motors / Props
M4 (CW)
M3 (CCW)
M2 (CCW)
M1 (CW)
The motor and propeller direction and numbering is
critical for the flight of the AR25. Each set of ESC/
Motor solder tabs are labeled on the side plates.
Because each ESC is fully configurable through the
flight controller via USB, we recommend not
worrying about the order in which the ESC output
and motor leads are wired into the plates because
we can change it in firmware faster than soldering.
NOTE: However, DO pay attention to ESC input wire
+/- wiring!
When replacing motors, props, and ESCs, please
make note of the proper direction and motor
number position.
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ESC / Motors
Motor direction can be changed either by
exchanging the position of any 2 motor or ESC
leads, or can be done in firmware via a simple
software configuration. After replacing motors or
ESCs, remove the props, power on, and arm the
motors. Note the direction they spin and make
adjustments to the wiring or firmware to reverse
direction.
ESC Power (check polarity!)
ESC Motor Leads
Motor Leads
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ESC
The ESCs supplied with the AR25 are Flycolor Raptor
30a model number W-FW020004.
Specifications:
Constant Current Rating: 30A
Burst Current Rating (10s): 40A
BEC: No
Cells: 2-4S
Weight: 9.6g
Processor: SiLabs F330
Firmware: BLHeli 14.4
BLheli Options Set:
Dampened Light: On
Oneshot125: On
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side plates
The AR25 side plates feature integrated RGB and
rear facing red LED lights, power and signal
distribution, integrated 5v regulated power supply,
an audible buzzer, XT60 power connector, an
auxiliary 5v power pinout, gold plated contacts,
solder-less/tool-less internal component connectors,
OSD mounting and external FTDI programming
pinouts, easily accessible motor/ESC solder pads,
and internal LC video filter.
The concept behind the design of the PCB design
was to reduce the tangled mess of wires commonly
found in FPV racers and offer a cleaner, more
reliable, and better performing setup.
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side plates
Right Plate (flight controller side)
Motor 1 ESC Signal Pins
Motor 2 ESC Signal Pins
5v Auxiliary Power Pins from BEC
Filtered Auxiliary BEC (internal)
Buzzer (internal)
XT60 Main Battery Connector
Gold Plated Bus Bar Screws
Flight Controller Screws, black plastic
OSD Advanced Solder Tabs and FTDI
Video Transmitter Access Ports
Video Camera Tilt Screws
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side plates
Left Plate
Motor 3 ESC Signal Pins
Motor 4 ESC Signal Pins
Gold Plated Bus Bar Screws
Video Camera Tilt Screws
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side plates
LEDs
There are 7 programmable WS2812 RGB LEDs on
each of the AR25 side plates. These LEDs are able to
be programmed and controlled via the flight
controller and Betaflight firmware.
(0)
(1)
(2)
(3)
(4)
(5)
(6)
In addition to the 14 programmable LEDs, there are
also 12 non-programmable red LEDs facing the rear
of the AR25.
The address for each WS2812 programmable LED is
shown in the following diagrams.
Non-programmable solid red LEDs
Programmable WS2012 LEDs
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side plates
LEDs
The address for each WS2812 programmable LED is
shown in the following diagrams.
(7)
(8)
Non-programmable solid red LEDs
(9)
Programmable WS2012 LEDs
(10)
(11)
(12)
(13)
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side plates
Bus Bar
The two side plates of the AR25 have a pair of 24k
gold plated aluminum power bus bars connecting
them that supply power from the battery, through
the right side plate and then into the left side plate.
When the battery is connected no not short metal
tools across the gold plated bus bar screws.
Disconnect power first!
**check screw torque regularly**
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Auxiliary pins
Ground
+5v 3A
An auxiliary 3-pin servo header has been provided
on the left side plate with a 5v center hot pin. This
auxiliary pin receives regulated 5v power from the
integrated AR25 3A power supply and is intended to
allow for the easy addition of an optional LED race
transponder.
Signal (unused)
Compatible transponders are available from vendors
such as Trackmate and iLap, for instance. But please
check with your local racing venue to see which
system they use.
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battery
Specifications
Internal Battery Bay Dimensions: 111mm x 30mm x 35mm
Standard AR25 battery: 4S 1P, 14.8v, 1800mAh, 60C, XT60, 210g
Standard battery dimensions: 105mm x 27mm x 35mm
Standard battery lead length: 150mm
Charge Rate: 1-2C (max 5C)
The AR25 battery has been specifically designed for
the internal battery bay and features extended
battery discharge leads and a genuine XT60
connector to reach the power input on the left side
plate.
To insert the battery the battery leads must face to
the rear and bottom of the frame. First pass the XT60
connector through the slot to exit the rear of the
composite frame, then tuck the balance connector
into the slot. Tilt the rear of the battery into the bay
and then rotate the front of the battery into position.
Secure the battery by lightly separating the plates
while inserting and rotating the battery plate tabs
into the slots in the plates until it “snaps” into place.
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fpv system
Video Camera Specifications
Model
Image Sensor
Horizontal Resolution
Lens
Signal System
OSD Set
S/N Ratio
Electronic Shutter Speed
Auto Gain Control (AGC)
Back Light Compensation
Minimum Illumination
WDR
DNR
Day / Night
Power
Net Weight
Dimensions
RunCam Swift
1/3 Sony Super HAD II CCD
600TVL
2.8mm 90 fov
PAL / NTSC
Yes
>60db (AGC off)
NTSC: 1/60 ~100,000
Yes
Yes
0.01 Lux/1.2F
D-WDR
2DNR
Auto/Color/B&W
DC 5 to 17V
12g
26mm x 26mm x 28mm
The video camera installed in the AR25 is the best
available on the market. Battery voltage (4S,
12.8-16.8VDC) is supplied directly to the camera via
the side plate and 3-pin Molex connector. The video
signal passes through the MinimOSD and an
integrated LC Filter before reaching the Video
Transmitter.
2mm screws allow for easy camera angle
adjustments between 24° to 70°.
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fpv system
Video Transmitter Specifications
The video transmitter channel display and change
button is accessible through two ports on the left
side plate. A short press will change channels while a
long press will change bands.
Button (short press - channel change, long press - band change)
Alternating Channel / Band Display
200mW
5.8GHz
40 Channels
Race Band
SMA Connector
CH1
CH2
CH3
CH4
A
CH5
CH6
CH7
CH8
5865
5845
5825
5805
5785
5765
5745
5725
CH1
CH2
CH3
CH4
B
CH5
CH6
CH7
CH8
5733
5752
5771
5790
5809
5828
5847
5866
CH1
CH2
CH3
CH4
E
CH5
CH6
CH7
CH8
5705
5685
5665
5645
5885
5905
5925
5945
CH1
CH2
CH3
CH4
F
CH5
CH6
CH7
CH8
5740
5760
5780
5800
5820
5840
5860
5880
CH1
CH2
CH3
CH4
R
CH5
CH6
CH7
CH8
5658
5695
5732
5769
5806
5843
5880
5917
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fpv system
On Screen Display (OSD)
DTR
TX
RX
+5V
GND GND
GND
Vid In
GND
GND
+5V
Vid Out
GND CURR RSSI Bat2 Bat1
GND
AR25 factory connections
Available pinouts via solder tabs (advanced users)
The onboard video system of the AR25 features an
integrated OSD. The MinimOSD Micro with KV Team
Mod was selected due to its small size and full
feature set. As delivered, the OSD has been flashed
with MW OSD R1.6 and is programmed to display
battery voltage. Power is supplied by the
independent onboard 5v power supply.
Additional advanced OSD features can be enabled
by expert users.
OSD video and voltage signal wires are integrated
into the 7-pin Molex connector on the side plate.
Additional pinouts for advanced users, including
FTDI, users are available via solder tabs on the side
plate.
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Accessories
Runcam HD Camera Mount
Carbon fiber bolt on isolated camera mount
GoPro HD Camera Mount
Carbon fiber bolt on isolated camera mount
FPV Camera Up Armor Kit
Carbon fiber armor kit for increased crash protection
Custom 6” Prop Booms
Carbon Fiber, 4mm, suitable for 6” Props
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Specifications
Weight RTF w/o battery: 556g
Length, Width, Height: 223.5mm x 218.6mm x 96.9mm
Motor Diameter / MultiGP Class: 239mm / 3S, 4S, Open
Propellers: 2- or 3-blade DALProp 5045 bull nose
Motors: Allied Drones 2205 Special Edition 2300kv hollow-shaft race motors
Battery: 4S 1800mah 75C
ESC: Flycolor Raptor 30A
FPV Camera - Runcam Swift
Flight Controller: RMRC Dodo rev. 3a, Betaflight
OSD: Micro MinimOSD w/ KV team mod, MWOSD firmware
FPV Tx: 5.8G 200mw 40CH Super Mini, Race Band, SMA antenna connector
Antenna: SMA Circular Polarized Omni Directional
LEDs: 14 integrated WS2012 programmable RGB + 12 solid red rear facing LEDs
RC Rx - integrated connector Frsky XSR micro sbus receiver
Race Transponder: External auxiliary 3-pin 5V connector compatible with any optional LED transponder
Airframe: ABS/Polycarbonate composite core with FR4 power/signal distribution plates
Side Plates: Integrated 3A 5V filtered power regulator, 26 LEDs, 4mm carbon fiber booms, internal battery bay, XT60 surface mount power connector, 24k gold
plated contacts edge plating and logos, white solder mask, individually accessible ESCs and motor wires, 24k gold plated side plate power bus bar and screws,
integrated LC video filter, integrated ESC filters
Buzzer: Integrated lost model buzzer
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Specifications
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