Control : Interfaces

An interface is put between the sensors and the computer. You can typically connect up to eight sensors and four devices to an interface made for a home computer. The interface contains two important components :

• An Analogue to Digital Converter ( ADC) which changes the analogue voltages produced by the sensors into digital signals that the computer can process.
• A Digital to Analogue Converter ( DAC) which changes the digital signals that the computer produces into analogue voltages which can control the devices.

GCSE ICT Companion 04 - (C) P Meakin 2004