A client needed a touch activated switch. The unit needed to be fairly small and wired into the underside of some kitchen cabinets. When touched, a string of fluorescent or LED lights, mounted under the cabinets, would turn on. The total light power is less than 100 watts.
The system into two parts. (1) A relay is mounted inside a
plastic junction box and (2) a touch switch module. Four wires leading from plastic junction box would connect to a
second box containing the touch switch module. The circuit is a simple relay driver powered by a9v battery.