# Raspberry Pi HQ external camera trigger circuit

**URL:** <https://forums.kinograph.cc/t/raspberry-pi-hq-external-camera-trigger-circuit/2874>\
**Category:** Uncategorized\
**Created:** [February 2, 2025, 7:10pm UTC](https://forums.kinograph.cc/t/raspberry-pi-hq-external-camera-trigger-circuit/2874 "2025-02-02T19:10:57Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![verlakasalt](https://forums.kinograph.cc/user_avatar/forums.kinograph.cc/verlakasalt/32/3649_2.png) [@verlakasalt](https://forums.kinograph.cc/u/verlakasalt)\
**Post date:** [February 3, 2025, 9:13am UTC](https://forums.kinograph.cc/t/raspberry-pi-hq-external-camera-trigger-circuit/2874/4 "2025-02-03T09:13:47Z")

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Maybe using a laser will work with your planned setup as well? [Laser-based sprocket registration](https://forums.kinograph.cc/t/laser-based-sprocket-registration/1810/1)

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