Touch and/or Contact Switch

Touch or Contact Switch Both a touch and a contact switch are built onto one PC board so that the builder can see how each works. A battery can power the contact switch but you’ll need an AC power supply for the touch switch to work well (use No. 80-040) for reasons explained with the kit. The circuit switches a relay with a 3 amp, 110 volt rating. Use to switch lamps, other appliances.