They do consume a resource for their continued operation though: bullets.
Unlike most things built in factorio, bullets are irretrievably lost after one use.

Ah, alrighty then.
I did try the search function, but didn't get the right terms I guess.
Thanks anyway, means I don't have to feel bad for my cheap cards. (they work miracles when you're low on oil ^^)

I've noticed a discrepancy in the recipe of the "Speed Module 3" that may not be intentional. The Mk3 version of every module costs 5 Advanced Circuits (red cards), 5 Processing Units (blue cards), 1 Alien Artifact, and 5 Mk2 cards. Except for the Speed module 3. That one costs 4 (four) of...