My brother in law asked me if I can create a quick load release for his DJI Phantom 4 quad-copper. for pulling a fishing line above the water.
Challenge excepted - and I added another role on top - no buying parts - just reusing things I got .
Here is our Lego/bambo/scrap parts in action.
The heart of it is a Attiny85 and it gets its input using an LDR.
The release machnisim is operated by a small servo.
Hope you enjoy it