Noobie needs help planning FM/RF Transmitter/Reciever

Wireless & IoT
1

I’m new to much of this so please bear with me. I am going to attempt to transmit a multiplexed analog signal. really simple. Transmitter is just FM and I think I’d like to use something like http://www.sparkfun.com/commerce/produc … ts_id=8972 for my receiver, however I’m having difficulty figuring out how to set the frequency. Perhaps I’d be better off with an FM receiver that uses a rheostat or pot to set the frequency, but I can’t seem to find simple/small setups for that either. What I really need is a simple set it and forget it stereo or mono transmitter and matching receiver that functions in the analog world. I don’t want to mess with ADC then DAC due to space constraints. The multiplexed signal is video.

2

You need something with a lot of bandwidth to handle video.

Leon

3

What about the 434Mhz RF Link http://www.sparkfun.com/commerce/produc … ts_id=8946. Can this be run in Analog? I apologize for my lack of knowledge. I’m trying to do this project as inexpensively as possible, it is just a proof of concept deal.

I also see that VHF TV (prior to digital) broadcast around the FM band. I don’t need any quality higher than VHF.

4

Video needs something like a 4.5 MHz bandwidth, IIRC. A TV operating on VHF had far more bandwidth than those 434 MHz units, which are digital and only handle 10k bit/s maximum. Check the data sheet.

Leon

5

So I’d be best off finding a VHF or UHF transmitter circuit and scratch building it… or converting to digital. IF I did convert to digital, what’s the cheapest, simplest way to transmit the signal 35 feet, line-Of-Sight.

6

The 2.4 GHz nRF24L01+ will handle video, but requires an MCU and you will need quite a lot of hardware and software expertise to use it. SFE sells modules.

Leon

7

Thank you very much for your help. I have some more studying to do.

8

It will also require a lot of data compression, as it’s limited to a 2 Mbps data rate. There are better devices for your application.

Leon

9

How about a wireless video transmitter similar to the ones from X10? They’re about $50 for the transmitter and receiver.