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  • iNav PDB OSD for AIR3, AirHero32
  • iNav PDB OSD for AIR3, AirHero32
  • iNav OSD for AIR3 USA EU Australia
  • Servo layout iNav OSD for AIR3 USA EU Australia
  • Direct iNav OSD connection to AIR3 - as per this photo except swap over the Yellow & Green

iNav PDB OSD for AIR3, AirHero32

Shipping Weight:
178.00 Grams
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Product Description

in stock 

iNav PDB OSD - This is a small power distribution board PDB with OSD for iNav designed to be connected to Sirius™ Air3 OSD pins - plug(solder) and play.  
OSD changes can be made with "sticks". Comes preloaded and iNav ready to fly.

This PDB makes assembling a single or twin engine plane easier as you can solder your uBEC, your ESC other devices to the PDB

AMPS sensors = includes an embedded AMPS sensor which converts amps used to a small linear voltage suitable for an analogue input to AIR pin4 (software still pending) 

AMBER LED = comms LED ; glows dull when communicating fully with AIR3 FC ; blinks to match FTDI leds when loading firmware or fonts ; is OFF when not communicating with AIR3 FC



1 x  PDB OSD for iNav as per photo - Plug n Play OSD iNAV is loaded and ready to go !
includes XT60 plug and wires

Note : FPV Tx power wires requires some soldering 
Install : Follow the diagram below to connect AIR3 and OSD. 


inav osd wiring diagram schematic AIR3


Note 1 - Pay attention to the voltage on the Red wires.  The Video in/out red wires are direct pass-thru ; so these should run at the voltage SAFE for your Camera and Tx - most modern cameras such as HS1177 or HS1195 can handle voltages in a range from 7.4v to 35v - but check first - then connect one of these reds to the LiPo.  
Note 2 - Carefully connect the other rainbow twisted wires side (5pin black/red/yellow/green/white) Vcc RED to 5v (max) only and the Yellow/Green plugs to the AIR mid row at pin 6 green & pin 5 yellow.
USB : When you connect USB to air - the Rainbow (5pin black/red/yellow/green/white) twisted plug must be temporary removed / unplugged at the OSD side 5pin connector to allow AIR3 USB to share UART1.
Note 3 - Position the OSD 75mm away from the ESC, Vtx, RC Rx or datalinks - keep wires twisted.
Note 4 - Notice how in the drawing all transmit and receive antenna devices are placed FAR APART on the foam plane.  This will ensure best range
Note 5 - Twist signal data lines, servo lines, FPV camera and VTx wires, ESC signal etc with a GND wire to reduce signal injection.
Note 6 - To make changes to settings such as changing feet to metres - disconnect USB -   (Before arming hold MID THRO ; RIGHT YAW ; CYCLIC FORWARD to enter menu and setting of all features)
Note 7 - Keep Aux4 (RC channel 8) free for assignment to a 3-posn switch ; as this has been pre-configured for turning the OSD on or off with a 3 position switch




iNav-OSD Connection 

Downloads - The OSD is Supplied with MWOSD Scarab-OSD firmware version 1.7.3 pre-installed - for future updates, to update iNav-OSD you can download it via the Chrome called MWOSD  

  • FYI - If you decide to upgrade firmware (not essential ) The MaxChip OSD will not tolerate poor/low 5v voltages - pls CHECK YOUR USB Cable - most cheaper mini USB cables use very thin copper and only transfer 4.5v (not 5.0v as they should do) - low voltages in MWOSD manifest with fonts issues , such as nil or partial font uploaded in MWOSD 
  • Use a USB FTDI hacker tool

  (Before arming disconnect USB - hold MID THRO ; RIGHT YAW ; CYCLIC FORWARD to enter menu and setting of all features)

For AIR3 you need to use the "Use FC Main Voltage" Can be accessed and set by Tx  "sticks" using your Tx (also) - more info HERE

inav-air3-use-fc-main-voltage MWOSD set up

Question - I don't see any OSD overlay, no text - i only see video picture ? Answer = The OSD can be switched off by RC command - however, This is usually when a particular FPV camera you are using has some type of built-in OSD "feature" and (even when off) these OSD circuits of the camera itself, block the iNav-OSD signal  - to test just unplug the camera where NO OSD is seen, and if you now see a black screen now with OSD-data ; that confirms your particular camera is not compatible  - We have tested ALL cameras sold by us on our site here - and they ALL work PNP.

Question - I only see a smooth black picture, no OSD no video image ? Answer = Is your OSD powered up (red LED on)? Check that your Camera and FPV Tx 3 pin plugs and not swapped over.  Check that the AIR3 is receiving 5v power.  Check that the 4 wires of the OSD are connected to AIR3 as per the diagram on this page.

Question - I see fonts on the screen but the font characters seems to be jumbled/corrupted ?  Answer = reload your fonts ;   Use the MWOSD Configurator Software (google Chrome store) - Connect to the osd with an FTDI HERE (5v,GND,Tx,Rx wires) and press FONT /Upload ; the FTDI will start blinking red and after approx 50 secs the UI of MWOSD Configurator will say DONE. This  reload the fonts -  if you are not sure how to reload fonts we can do it for you as a free service + postage

Question - How do i update the mini-iNav-OSD MWOSD in future,  firmware ?  Answer = You will need the FTDI/USB ; 1. disconnect the 4 pin data plug from the front of the OSD going to AIR3 ; 2. Connect the FTDI-USB ; both share UART1 - so these CANNOT be pysically connected at the same time.  This is never an issue as when flying USB is not connected - and changes can be made with "Tx Sticks" anyway.

you Need an online connection to update new versions of firmware

  • GUI must be disconnected. press disconnect
  • Select com port
  • Click Flash
  • Click Select
  • Choose version you want for iNav-OSD - SELECT Minum OSD firmware board type
  • Click load online hex firmware
  • Click Flash FW
  • press the Hacker RESET button briefly whilst its saying "waiting for bootloader RESET" 

For iNav-OSD, press RESET button whilst its saying waiting for bootloader RESET

Question - i see the words "NO DATA" in my MWOSD screen display? what does that mean? Answer = "no data" means the OSD Chip is not communicating with the the CPU Chip - so usually this means you have not connected the Tx/Rx wires correctly (yellow/green wires) - remember Rx goes to Tx and Tx goes to Rx.  Also make sure the UI  has telemetry enabled.  on AIR2 and AIR3 the OSD UART1 is shared with USB - so while doing iNav (or BF) on the ground the OSD will not function. Like wise in the air while flying USB is not connected so UART1 is the perfect port for OSD.

Question - How do i use main LiPo Voltage and show that on screen of the OSD? Answer = normally we don't do this with modern 2017 telemetry radios because we have moved-on to powerful "Co-pilot VOICE" audio calls of the Taranis to call out the RSSi/Voltage and warnings.  As an experienced Captain of manned aircraft i can assure you this is better than "visual overload" - Also Cell-by-Cell monitoring with an MLVSS or FLVSS HERE is far superior to total voltage - total voltage can hide a diving-CELL.   However if you really want or need the OSD to show main voltage you can use the +ve voltage sensor pad inside the AIR3 (open it up) called ~BATT (near the USB) ; then make sure the MWOSD main voltage tab has "USE FC Main Voltage" ticked, save.  For more info SEE HERE



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