Raspberry Pi HQ external camera trigger circuit

Wondering what I would use to externally trigger? There’s no decent examples online

If you read my previous post then you would also know that I already have a plan to manually trigger it based off the advance mechanism

Maybe using a laser will work with your planned setup as well? Laser-based sprocket registration

You can probably use a magnetic reed switch triggered by a magnet on the shaft driving the shutter and claw. See https://youtu.be/cv4aX46CCT8 for an example

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