Start an acquisition via external trigger

I am trying to start an acquisition of a Blackfly S via an external trigger.
This is how I configured the GPIO of the camera:

Then I connected the 5V TTL signal via the switch on the back of the camera. The brown wire to GND and the signal to the green wire (line 3). The high state of the signal lasts 250ms

(see https://www.teledynevisionsolutions.com/en-150/support/support-center/application-note/iis/configuring-synchronized-capture-with-multiple-cameras/)

but when I go to the Recording Window the recording does not start

what am i doing wrong? what can i do?

**UPDATE**

My fault!I didn't realise that I had to put the camera in 'Play' BEFORE go to the recording window and press ‘Start Recording’.
From what I understand pressing 'Play' means to put the camera in ‘wait for a trigger’ and then pressing ‘Start Recording’ will prepare the camera to record the images that will be captured.

TDY_Manuel

Community team

February 27, 2025 17:57

Glad to hear you figured it out. You are right, hitting the play button starts the cameras image acquisition and transfer, but since it is in trigger mode it will sit and wait for the trigger signal. And hitting start recording will just start the software side of the recording and makes the software wait for incoming images.
Best regards,

Manuel

Leonardo

February 28, 2025 13:28

Hi Manuel,
Thank you for your reply.
I have another question. Is it possible that the external trigger directly starts saving the images on the disk?
That is, once I press ‘Play’ and the trigger arrives, the software starts saving the images on the disc?

Thanks

March 19, 2025 13:16

Hi Leonardo,

Without opening the recording dialog in SpinView? I'm afraid that is not possible. But you can look at our source code examples. E.g. the Acquisition example basically does that.

Best regards,

Start an acquisition via external trigger

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