Holybro Atlatl Mini FPV Installation and operating instructions

Atlatl Mini FPV
Video Transmitter
V1.0
User Manual & Installation Guide

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Contents
Overview...........................................................................................1
Features
Specifications
Warranty
Pinout Diagram and Channel Table......................................3
Installation Guide..........................................................................4
Using The OSD………………………………………………...……5-6

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Overview
Features
•Compatible with all major FPV receivers from vendors such as Fatshark, ImmersionRC, etc.
•Supports the standard 40-channel set: band A, B, E, Fatshark, and Raceband.
•TBS Telemetry Protocol input allows remote control by the flight controller. Change channel,
transmit power, and more from Betaflight OSD, flight controller USB port, Taranis Lua Script, and
more.
•MMCX connector is durable and easy to use. Rated for 100’s of mating cycles. Easy and quick
antenna changes. No more ripped-off UFL connectors.
•Variable transmit power 25 mW or 100 mW.
•0.5 mW True Pit Mode allows you to power up safely without the risk of knocking other pilots
out of the air.
•Tiny form factor for easy installation in tight racing builds.
Specifications
•Output Power: 0.5 mW (pit mode), 25 mW, 100 mW
•Antenna Connector: MMCX
•Input Voltage: 4.5 to 5.5 volts (nominal 5v power)
•Dimensions: 19x16x4.5mm
•Weight: 1.6g (without antenna)

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Warranty and Return Policy
If you believe that your Atlatl is defective, please contact us. If we determine that the product is
defective, it will be repaired or replaced at no charge to you. We may ask you to send your Atlatl to our
service center for examination or repair. Shipping costs are your responsibility. Returned items should
include the original packaging and all accessories.
If product is damaged or defective, we will repair or replace it. Refunds are only given when product is
lost by the shipping company. The refund amount is limited to the price of the product. Shipping costs
are never refundable.
Contact us at:
•Email: productser[email protected]m
•Facebook Page: Holybro

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Pinout Diagram and Channel Table
1 2 3 4 5 6 7 8
ABand A 5865 5845 5825 5805 5785 5765 5745 5725
BBand B 5733 5752 5771 5790 5809 5828 5847 5866
EBand E 5705 5685 5665 5645 5885 5905 5925 5945
FIRC/FS 5740 5760 5780 5800 5820 5840 5860 5880
CRaceBand 5658 5695 5732 5769 5806 5843 5880 5917
Pin
Function
VI
Video In (from camera)
T
SmartAudio Input
G
Ground
5v
Input Voltage (4.5 to 5.5 volts)

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Installation Guide
The Atlatl Mini is small enough to install almost anywhere on your quad that you find convenient.
Typically it would be mounted using double-sided tape, and possibly a zip tie to hold it securely.
Although the Atlatl’s MMCX connector is quite durable, we strongly recommend securing the antenna to
the frame so that the Atlatl won’t be damaged if the antenna is tugged on in a crash. There are various
ways to do this, including 3D printed parts, or even just zip-tying the pigtail to a standoff.
Wiring up the Atlatl is not complicated.
1. Solder the red wire from the 5v pad to the voltage source for the Atlatl. The Atlatl requires 4.5v
to 5.5v voltage (nominal 5v). You must run the Atlatl from a 5v power supply such as the voltage
regulator of your flight controller or ESC. If you connect the Atlatl to a higher voltage supply, it
will be damaged or destroyed.
2. Solder the black wire from the G pad to a ground pad on the flight controller. Video noise will be
minimized if you solder your Atlatl ground wire and your FPV camera’s ground wire to the same
pad. Twist them together and tin them before soldering them both to the same pad.
3. Connect the yellow wire from the VI pad to the video signal wire of your FPV camera. The
camera’s video wire will usually be yellow as well. You can directly solder the two wires
together, or you might have a PDB or FC with a “Video In” and “Video Out” pad. In that case,
solder the camera’s video wire to “Video In” and the Atlatl’s video wire to “Video Out”.
4. The Atlatl can be remote-controlled using TBS SmartAudio protocol. This is the recommended
use of the Atlatl. To use this feature, solder the blue wire to from the T pad of the Atlatl to the
TX pad of the UART on your flight controller that will be used for this feature. See your FC’s
documentation for help deciding which UART to use.
5. In Betaflight or Cleanflight, go to the Ports tab. Enable TBS SmartAudio protocol on the UART
that you are using to remote-control the Atlatl (the UART whose TX pad you soldered the blue
wire to). Do not enable any other function on this UART. Each UART must have only one
function active at a time.

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Using The OSD
If you are using a Betaflight Flight Controller with Betaflight OSD, you can manage the Atlatl’s transmit
power and channel from within the OSD.
The graphics above show the stick command to bring up the OSD menu. The stick command is: throttle
centered, yaw left, pitch forward. The exact stick command therefore depends on which mode your
transmitter sticks are in.
In the OSD menu, use pitch up/down to move the cursor
between menu items. When a menu option has a > symbol to
the right of it, this indicates that it contains a sub-menu. Roll-
right will enter the sub-menu. For example, in the screen to
the right, moving the cursor to “Features” and then moving
the roll stick to the right will enter the “Features” sub-menu.
To manage the Atlatl, enter the “Features” menu. From
there, enter “VTX SA”
Mode 2 Mode 1

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The screen to the right shows the current vTX settings. From
here, you can change the frequency band, channel, and
power level of the video transmitter. After making the
changes, move the cursor to “Set” and press roll-right to
confirm the settings.
The Betaflight menu has pre-set output power values. If you
set the menu to 25 mW, the Atlatl will be at 25 mW. If you set
the menu to 200 mW, the Atlatl will be at 100 mW. If you try
to set any other value, the change will be rejected as invalid.