[Resource Download] The download address is as follows:
https://docs.qq.com/doc/DTlRSd01BZXNpRUxl
Function description of CNC FM transmitter:
A digitally controlled FM transmitter is designed using the FM transmitter special integrated circuit BH1415F produced by Rohm Company. The transmitter frequency can be set arbitrarily in the range of 80.0-109.9MHz, 11 channels can be preset, and the minimum value of the transmitter frequency adjustment is 0.1MHz, with mono Channel/stereo control, can be widely used in school wireless broadcasting, TV live broadcast, wireless speech and other places. It is controlled by single-chip STM32F103C8T6, the matrix button can set the channel frequency, and has the following functions.
(1) Adopt BH1415F
(2) Set the transmit frequency arbitrarily in the range of 80.0-109.9MHz
(3) 11 channels can be preset
(4) Button transmit frequency adjustment minimum is 0.1MHZ
(5) Mono/stereo control
(6) 4*4 Keyboard: 11 frequency preset keys, 2 keys control the increase or decrease of frequency, 1 as stereo control key.
(7) Sound signal source: use audio cable to connect mobile phone and other equipment input
(8) LCD1602 display
Information description:
The attachment content provides the AD format schematic diagram PCB project file, which can be opened with altiumDesigner.
The program is written in C language, compiled by keil software, and the file is the project source code.
Tips:
This design has been verified in kind. The source files and source programs of the circuit diagram are successfully verified and usable. It can be said that it is a good material for learning the design and production of MCU! Hope this sharing is helpful to everyone!
