DIY Micro Fog Machine From Green Smoke E-Cigarette Cartridge
Basic pushbutton switch circuit.
Greensmoke E-cig cartridge refilled with vegetable glycerin. Inside it, a wire gets red hot, and vapourizes the glycerin.
Solder wires on instead of battery.
Don't hack adaptors that you use for other things. You are very likely to break burn them out or otherwise destroy them. Read the output in volts and in mA. A smoke machine uses heat, which means high amperage. These adaptors are less common.
Adaptor output MUST deliver at least 2 Amps and at most 4.5 volts. If not, this is like short circuiting it and could destroy it.
Do not use a switch that stays on - you could cause a fire.
Note that youtube user sccloser says that AA do work!