Thre are various relay boards available that are made for use with microcontrollers, parallel ports, etc.
http://www.ecrater.com/p/3528455/fp08-8-relay-board-kit-for-pic
Thre are various relay boards available that are made for use with microcontrollers, parallel ports, etc.
http://www.ecrater.com/p/3528455/fp08-8-relay-board-kit-for-pic