I want to build a system that will in some way release a loaded spring, that launches some other mechanical parts into motion. However the activation is going to be tricky. Think like a mouse trap. Loading and securing the spring will be by hand, but the release needs to be triggered remotely.
It would be simple enough to have a servo or two crimp down on a line or string, like scissors, but I believe that would require a fair amount of power. This is in a system where size and weight are at an absolute premium. Every inch and gram counts. I was thinking of a hole where a line could pass thru with maybe a pin that punches in to hold it in place until release, but even that I am not quite sure how to approach. Other possibilities might include heating the securement (think low-test fishing line) or otherwise cutting it, but I am not sure how best to proceed.
Thanks for any ideas!