# Connect the Camera Trigger

There is a Replay -to-PWM module in the camera box, It is used to convert Relay (TTL) to PWM triggering. (see below photo)

<figure><img src="/files/IjsmElzvT6nXQnI5VQXV" alt="" width="375"><figcaption></figcaption></figure>

<figure><img src="/files/7tcwripVrj3B1wX9rcRJ" alt="" width="563"><figcaption></figcaption></figure>

WITHOUT the Replay -to-PWM module, if user connect the shutter and GND ports directly to flight controller, then it is Relay (TTL) triggering.


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