Simulate Capacitive touch

I am trying to automate my home, and as a part of it I want to control my lights. I don't want to be working with high voltages so I am making something that sits outside the light switch. Some of those switches are dimmers, and they are controlled by capacitive touch.

I was wondering how I can simulate a touch on the dimmer.

If its makes any difference I plan to make it battery powered.

hello, you could use this IC, i was thinking of playing around with it, but i havent got the time

http://uk.mouser.com/ProductDetail/NXP-Semiconductors/PCA8886TS-Q900-11/?qs=sGAEpiMZZMtI9m3qjja%2FqsPntIJ2qhsaCpAEJ%2F8EBPo%3D

Good luck

At this page are some schematics for touch switches
If you want to do analog voltages, things are a bit more complex. But you can try the transistor approach, with correct values you get some good readings, since they were used for very accurate meassurements.