How to wire up a Walksnail Avatar VTX to a flight controller. The TX/RX connects to your UART of choice. The positive and negative pin choice will depend on the variant you have:
- Walksnail Avatar HD Mini 1s Lite (3.1-5V, for use with 1S batteries – whoops)
- Walksnail Avatar HD Nano (3.1-13V, 14x14mm camera, for use with 2-5S batteries)
- Walksnail Avatar HD Micro (6V-25.2V, 19x19mm camera, for use with 2-6S batteries)
The makers of the Avatar recommend using a regulated power supply. For the Mini and Nano, one can use a 5V regulated supply from the FC. If you are using a Micro, it requires 6V or more. A regulated 9V supply is on some FCs, but not all. If you don’t have a 9V regulated supply, then the VBAT connection is a logical (only) choice, but this is unregulated. From Caddx:
It is recommended to use a regulated power supply for power supply. If you use a 6S battery, be sure to install a capacitor at the battery input. It is recommended to use [a capacitor with] the specifications above 50V/47uF. If the voltage ripple is higher than 35V the risk of burning the device is high.
Therefore, if you’re using the VBAT with a 4 cell LIPO (which has max charged voltage of 16.8V) you should be ok using VBAT without a capacitor, but with a 6 cell LIPO (max charged voltage of 25.2V) you must use a capacitor to avoid voltage spikes. Generally speaking, using a capacity is recommended.
Here’s an example using a Flywoo Goku F745 PRO FC to a Walksnail Avatar Mini (requiring 6V-25.2V input), which has a convenient 9V positive terminal next to UART2.
After wiring up to a chosen UART (here UART2), in Betaflight configure your chosen UART for connectivity.
And finally ensure OSD is enabled.
Article updated August 2023 to reflect the Micro/Nano/Mini variants of the Avatar range.