Wireless speed-control car

摘要

. Many applications, that involve the use of constant and fast regulated speed motors for various loads, require the usage of Direct Current (DC) motors. DC motors are configured across a large range of powers and different levels of speed. The simple techniques for controlling them, such as pulse width modulation, and the high performance of the DC motors functioning will yield to an increasing growth of the applications number and their varieties in the future. On the other hand, wireless communication is widely adopted in communication and information interchange, particularly with the spread use of cell phones. This article presents a wireless DC motor speed-control system by using PIC 16F877A microcontroller. An electronic circuit is coupled to the motor to provide the control-speed signal serially from distant microcontroller. A control panel is designed as an interface for the user to select the appropriate speed. The used commands are sent wirelessly to the control circuit driver. The microcontroller of this circuit regulates the DC motor as required using the pulse width modulation technique. Our approach is achieved by implementing a hardware prototype system constituted of two DC motors of a toy car. Total control and performing regulation are observed.