The main objective of this report is to build and examine the automatic temperature controlled motor speed, here focus on Automatic Fan Controller Based on Temperature. Other objectives are to know the circuit and determine how the different parts of the circuit function together to make the automatic temperature controlled motor speed. Here also familiar with the use of design and simulation tools in the design process. For this project the design and simulation of the FM Voice Transmitter circuit is using the Or CAD Capture CIS Software.