*A MOT can kill you instantly or give you a really nasty shock and they are not toys, I have been shocked by one and it was freaking scary and painful so BE CAREFUL! i am not responsible to any damage caused!
Step 1: You will need
A light switch
A inlet from a computer power supply or something like it
A PFC capacitor (optional). 20uF at 250V+ should work just fine
Some .250" female spade connectors (bag of 50 for $2.20). You will also need some smaller ones for the inlet but I don't know what size
Some 14 awg wire. Speaker wire or an old power cord will work just fine
A 12" piece of 2 x 4
A soldering iron and solder
Some screws. I used #8 x 1/2" screws from Home Depot
Step 2: Position the transformers
Step 3: Position the other stuff
First off connect the neutral from the inlet to the bottom lug on the switch. Next connect a wire from the top lug on the switch with a spade connector on the end to connect the capacitor to (you will need to use the capacitor to measure your wire length). Next connect the live from the inlet to the other connector on the capacitor. Then connect the ground to the screw on the switch and another wire to the transformer cores, i just soldered it to the end on the secondary winding. Last thing is to secure everything, I bent a metal bracket from a transformer mount to fit the shape of the inlet and screwed into place to keep it from moving every time I pug and unplug it. I just used super glue to hold the capacitor...
Step 4: Wire up the transformers
Connect the neutral and live wires coming off the capacitor to the to either the two left, or the two right leads on the transformer primaries, not one on left and right or vice versa. Connect the two other leads together and that will be it for wiring everything up.
I used thin steel wire to keep the wires neat and close together.
Step 5: 240V-120V outlet adapter
I got the bottom of a wall wart that still had the prongs on it and i bent one sideways and made it as flat as i could, I then heated up a copper wire and melted it through the plastic for my ground. I got the end of an old extension cord that iv'e been saving for a long time and connected that so i could plug my 120V power cord into it.