Hi, I am new in this forum. I would like to build small FM radio station. Firstly I want to transmit a song. I have an arduino and 433Mhz rf transmitter. Can you tell me the steps that I need to take?
Thank you for your answers in advance.
Put the RF transmitter to one side and buy a Silicon Labs 4713 breakout board.
TheMemberFormerlyKnownAsAWOL:
Put the RF transmitter to one side and buy a Silicon Labs 4713 breakout board.
So does an Arduino have anything to do with this?
furknkalayci:
Hi, I am new in this forum. I would like to build small FM radio station. Firstly I want to transmit a song. I have an arduino and 433Mhz rf transmitter. Can you tell me the steps that I need to take?Thank you for your answers in advance.
Did you check if is it legal to transmit continuous music on 433mhz in your part of the world ?
Yes, it's an I2C device, and needs a microcontroller to ...control and configure it
srnet:
Did you check if is it legal to transmit continuous music on 433mhz in your part of the world ?
I don't want to broadcast music. I am making radio receiver with fpga but I dont have a good antenna. That's why I would like to use arduino as a transmitter . If I can transmit only one song, it is enough for me.
The RF Spectrum regulations are different in different countries, but they are "harmonized" to be similar. There are generally no exceptions for experimentation, apart from special licenses. There are no exceptions for, "just one song".
In reality, what you want to do is harmless because of the low probability of causing interference. However, the laws have to apply generally, and be somewhat over-reaching, because interference is so variable.
Just be aware that what you're planning to do is probably illegal. If you're testing in a lab, you can use pigtail leads to avoid transmission, or operate in very close proximity with compromised (stub) antennas to avoid significant radiation levels.
Most Arduinos lack the memory to even store the opening second of a song. You need to use some kind of external memory.
Then I wonder how you envision the music gets transmitted. Digitally as mp3 file? Analog as FM radio? Something else?
furknkalayci:
I don't want to broadcast music. I am making radio receiver with fpga but I dont have a good antenna. That's why I would like to use arduino as a transmitter . If I can transmit only one song, it is enough for me.
Your posting makes absolutely no sense. You have signal generators in your lab that can cover the 433mHz frequency and they all have the ability to use external modulation. Use a signal generator with FM capability and find some audio source to drive the signal generator.
Paul
Paul_KD7HB:
Your posting makes absolutely no sense. You have signal generators in your lab that can cover the 433mHz frequency and they all have the ability to use external modulation. Use a signal generator with FM capability and find some audio source to drive the signal generator.Paul
You are right but I am a student and I can't go to lab because of corona. Thank you all, I guess I thought wrong. I will try to find new solution.
We would be happy to help you find a solution, if you explain much better what you are doing.
aarg:
We would be happy to help you find a solution, if you explain much better what you are doing.
Actually my project is software defined radio with FPGA. I only need to make FM receiver with FPGA, so arduino is not part of my project . However I thought if I have a transmitter in the same room I can test receiver easily. I found a 433 Mhz transmitter and I thought I can use it as a radio transmitter.
Those transmitters can't do FM, only AM. Can't you just receive broadcast FM that is available almost everywhere?
Although... I asked you for details, and you gave me a vague, "a 433 MHz transmitter" again. You have to provide specifics.
Broadcast FM is typically the 80-108 MHz band. Not 433 MHz.
The 433 MHz band, at least in the US, isn't an audio band so the whatever the specific transmitter, it is probably a digital mode transmitter. Some (e.g. HC-12 / Si4463) have FSK modes, which strictly is a subset of FM and could be used to test an FM receiver. That's why it would be helpful if the specific transmitter were identified and we had some idea of your full system configuration.
More to the point, in a digital radio the FPGA is typically operating on digital baseband signal from a analog receiver and digitizer section. To test the FPGA in isolation one really needs to synthesize a representative signal for that, which could be done using another FPGA board or the same FPGA in a loop back configuration.