1、 毕业设计 中图分类号： 无线音频转发器无线音频转发器 专 业 名专 业 名 称 ：称 ： 应用电子技术应用电子技术 学 生 姓 名 ：学 生 姓 名 ： 导 师 姓 名 ：导 师 姓 名 ： 职职 称称： 讲师讲师 20201111 年年 1212 月月 摘摘 要要 进入 21 世纪,随着人们物质生活的提高，舒适性、方便性已经成为电子产品的重要考 虑因素， 基于此而设计的车载 MP3 转化发射器就是这样一个较为人性化的产品,它大大提高 车内播放音乐的方便性和安全性。车载 MP3 转化发射器其实就是一个新型的数字化调频发 射器， 它具有将音频信号转化成为调频信号发射出去的作用,具有方便携带,使
2、用简单,频率 稳定、 发射频率在 88.0MHZ 至 110.0MHZ 范围内任意可设等特点。 而本文所介绍的调频发射 电路的设计，采用的是无线音频传输集成芯片 BH1415F，其发射频率采用 AT89C52 单片机 控制，外围电路配以数字化液晶模块 1602 显示发射频率，操作更加直观方便,此电路发射 频率较为稳定，抗干扰能力较强，适合于将各种音频信号转化为一定频率的调频信号进行 无线发射。 关键词关键词： BH1415F AT89C52 数字化控制 LCD1602 调频发射 焦作大学机电工程学院毕业设计 Abstract Abstract Entering the 21 century,
3、as the peoples material life improving, the comfort and convenience have become the important factors of electronic products. The car year change of MP3s emitter is just the humanization product designed basing on that, and it greatly raises the convenience and safety of music broadcasting inside th
4、e cars. The car year change of MP3s emitter is a new digitization frequency modulation emitter. It can change the frequency signal into frequency modulation signal, and it possesses the characteristics such as conveniently carrying, simply using, steadily frequency, and the launch frequency can set
5、to randomly from the scope of 88.0 MHZ to 110.0 MHZ. This paper introduces one kind of design of frequency modulation launch circuit. It uses the wireless frequency transmission chip BH1415F, its emissive is controlled by AT89C52 SCM (Single Chip Micyoco), and the peripheral circuit integrates the c
6、rystal module1602 showing the launch frequency. The operation is more directly and convenient, and the frequency launched by the circuit is comparatively stable and has strong anti-jamming ability. It is fit for changing all kinds of frequency signal into a fixed frequency modulation signal of frequency and launching wirelessly. Key words: BH1415 AT89C52 digitization control LCD1602 the frequency modulation launch 焦作大
