Need way to fill small air canisters (4-8oz) w/ bike pump
I've got a couple of older small CO2 canisters that I haven't used in a few years. I figured a good way to reuse them was to make a refillable canned air. The only problem is I don't have an air compressor. What I do have is a bike pump. Does anyone have any good ideas on how to (1) get air into the cylinder with the pump and (2) make some sort of release system, trigger or otherwise, to release it like canned air. I'm looking to use it to blow out electronics and the like. Yes I know about the moisture issue but not terribly concerned with it.