If you want to control AC devices with a motion sensor, then it may be easier to just modify a motion sensor that is already designed to work with AC devices. A good example of this is motion-activated security lights. I had an old Heath Zenith motion-activated light that I was able to turn into a motion-activated AC outlet. To do this, you will also need a three prong power cord with a male end, a three prong power cord with a female end, and four insulated twist-on connectors.
Start by identifying the wires that are connected to the motion sensor unit. In this case, the green wire was ground. The white wire was neutral. The black wire was the hot input to the sensor and the red wire was the hot output from the sensor. This color code may vary depending on where you live.
Next you need to separate the motion sensor from the attached lights. Start by disconnecting the wires. You will probably need to cut the wires at the connectors. Remove the motion sensor assembly by unscrewing it from the mounting plate.
Now you need to connect the wires from the motion sensor to the appropriate wires on the two power cords. Start by cutting the power cords and separating each of their internal wires. Then strip the insulation off the ends of each of the wires. When connecting the wires, all the connections should be made with insulated twist-on wire connectors. Start by connecting all of the green wires and any bare wires together. Next, connect one wire from the male power cord, and one wire from the female power cord to the white wire on the motion sensor. Then connect the third wire from the male power cord to the black wire on the motion sensor. Lastly, connect the third wire from the female power cord to the red wire from the motion sensor. As an extra safety precaution, I enclosed all the connections in an insulated plastic housing.
Now you have an AC outlet that can be activated by a motion sensor. Just plug the male power cord into a wall outlet and plug your appliance into the female power cord. The motion sensor should be able to power appliances that are rated as high as the original lights. In my case, the original lights where three 100 watt halogen lights. So it should be capable of driving circuits up to 300 watts.