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本文介绍的遥控器具有5个通道,能多路同时工作,适合于车、船模型的遥控。遥控器的核心是两块大规模CMOS专用编、译码集成电路。该集成电路的工作电压低(2.5～5V),外围元件少,制作容易,调试简单,很适合业余爱好者制作。下面以车模为例,介绍其电路原理。 发射机 图1是发射机电路图,其中TX2及其周围电路组成编码器。TX2的引脚排列及内部框图如图2所示。K1、K2为两组接地的双刀多掷指令开关。R1、D1、C1、C2组成稳压电路,输出3V电压供IC1使用。R7为IC1的外接振荡电阻,配合内部电路产生时钟脉冲。K1、K2的不同接通方式,使TX2的⑧脚串行输出不同的编码脉冲。这些表征不同遥控指令的编码脉冲作为调制信号,送到调制器
This article describes the remote control with 5 channels, can work simultaneously, suitable for car, boat model of remote control. The core of the remote control is two large-scale CMOS dedicated coding, decoding integrated circuits. The IC’s low operating voltage (2.5 ~ 5V), fewer external components, easy production, commissioning is simple, it is suitable for amateurs production. The following car model, introduced its circuit theory. Transmitter Figure 1 is a transmitter circuit diagram, which TX2 and its surrounding circuit encoder. TX2 pin arrangement and internal block diagram shown in Figure 2. K1, K2 for the two groups of poles Pogo instructions switch. R1, D1, C1, C2 voltage regulator circuit, the output 3V voltage for IC1 use. R7 is the external oscillation resistance of IC1, cooperate with the internal circuit to produce the clock pulse. K1, K2 different ways to connect, so that ⑧ pin TX2 serial output different encoding pulse. These encode pulses representing different remote control commands are sent as modulating signals to the modulator