MartinFowler

FM wireless microphone/TV sound transponder - based on QN8027 FM transmitter chip

Overview

This chip requires a microcontroller for programming and configuration. The program is not attached for now, considering that I did not write it.

After the board is configured for I2C communication with the microcontroller, it can add the signal received by the microphone to the high-frequency carrier and transmit it out. An antenna is required.

Or transmit the audio signal received by the headphone interface.

You need to use a radio (hearing headphones are enough) to receive.

I originally wanted to use an independent power supply and used a 3.3V voltage regulator chip, but I don't know why the independent power supply does not work properly. I had to use the 3.3V on the STM32 microcontroller development board for power supply (that is, ignore VCC and connect the 3.3V I led out to the power supply). The pin and GND pin header are connected to the microcontroller for power supply. Do not solder the voltage regulator chip and C4 and C5,) and use it to configure the QN8027 chip through I2C.

I hope someone can help me find out why my 3.3V independent power supply is not working properly.

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-05-13 22:45:46

To embedded system beginners----Chuanke Innovation (CTIC)
In fact, it is not important what industry you are in, what is important is whether you can become an elite in this industry! ! If this problem is solved, then your life is half successful. Remember t
Seeking advice from an electronics engineer.
My major is electronic information engineering, electrical engineering and automation.
I want to ask the experts to know how to self-study FPGA and recommend a good board
I have learned FPGA in school, but I have no contact with it at all in the company. But I don't want to give up learning it, so I want to learn it in my spare time. I hope the experts can give me some
Why do my chip coins keep decreasing even though I haven’t bought anything?
:funk: Why do my ChipCoins keep decreasing even though I haven’t bought anything?Does giving someone a reputation reduce the amount of core coins?[[i] This post was last edited by l0700830216 on 2012-
Exploration on the causes of LED dead lights
[color=black]LED not lighting is what people in the industry call dead light phenomenon, and the reasons are nothing more than two situations: First, the leakage current of LED is too large, causing t
DXP works blockbuster, let you see enough~~~
[i=s]This post was last edited by jwyx on 2016-8-26 18:37[/i] Hello everyone:handshake =================================================================================================================

Datasheet More

Circuits More