What module I can use for VHF Range between 135MHz and 175MHz

Other Hardware General Electronics
1

Hi All,
I want to make a little device than can receive VHF radio frequencies on a range between 135MHz and 175MHz but I am a beginner and I don't where to start. :astonished: Although I am good programmer but I know not much about electronics :(. I am not sure if Arduino has any module for that?
I found this little module http://radiometrixstore.com/receivers/nrx1.html but I am not sure if it is compatible with Arduino can someone please advice me on that.

I highly appreciate any comments and and suggestions. Many thanks in advance.

Many thanks,
Zardaloop

2

I want to make a little device than can receive VHF radio frequencies on a range between 135MHz and 175MHz

What you want to receive? What kind of modulation? Voice? Data?

3

Hi Pito, I want to receive data. :roll_eyes:

4

Where the data come from?

5

Hi Pito,

Data is transmitted by a sender in form of radio wave and I know the algorithm to convert the code. I am just not sure how can I hook up things together to be able to program the chip. :~

6

I am just not sure how can I hook up things together to be able to program the chip.

You must clarify a little bit what you want to do. The module above is a cheap single frequency FM receiver, which shall be used with a similar module called transmitter (working at the same frequency). There is no chip inside the module probably as it is not programmable.

You are talking about a "range 135-175MHz" - does it mean you are looking for a module which can receive anywhere in that band (with programmable frequency) or you just asking on a module with a fixed frequency somewhere in that range?

7

Thanks Pito,
I want to receive two frequency of 161.975Mhz and 162.025Mhz . I know this one doesn't have any chip.
I am wondering if I can use this module and being able to program a chip on Aruino board to get the data from this module?
I don't want to transmit anything I only want to receive.

8

Data is transmitted by a sender in form of radio wave and I know the algorithm to convert the code.

You know the algorithm - so you can program arduino to receive the data, provided the data you want to receive are slower than 10kbits/second (the data rate limit of the VHF module).
Have fun!

9

Do you know the modulation type of the data being transmitted.
The module you have selected is a NBFM receiver.
It will only work is the transmitter is also using NBFM to send the data.

10

sonnyyu:
64MHz to 1,700MHz Software Defined Radio

http://www.funcubedongle.com/

drop a line to its support to confirm if it works. I know it will not work with Arduino but at least it works with Raspberry Pi.

11

As others have said, it's not enough to know just the frequency of the signal, you also must know the bandwidth of the signal and the modulation and encoding method being used. Only then are you in a position to select the proper receiver module.

Lefty

12

Also you need to have an idea of what sensitivity you need and out-of-band rejection requirements (some receivers
are awful at this). Antenna? Do you have one, is the signal polarised? We need more information, the spec's of the
transmitter would be a good starting point, this is a complex area to guess about.