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O4 Armer
AC-O4A
No flight controller? No problem! Easily arm a DJI O4 or O3 Air Unit with this simple device
If you've ever wanted to add HD FPV to an RC car, boat, plane or anything else without a flight controller, the O4 Armer is exactly what you need!
The DJI video system will not output its full power unless there is an 'armed' signal sent to it, like you'd get from a flight controller. The O4 Armer sends this 'armed' signal after being powered on for ~20 seconds, automatically.
Just plug in your O4 or O3 Air Unit with its stock cable, power the O4 Armer from a 2S-4S LiPo and you're set. There is also a JST-XH connector for a 5V fan to keep your Air Unit cool, and an optional solder pad which accepts a PWM input, allowing you to turn the Air Unit on/off and toggle low/high power mode.
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| Input Voltage | 7-17V DC |
| Battery Connection | XT30 |
| Air Unit Connection | 6-pin JST-SH |
| Fan/5V Connection | 2-pin JST-XH |