Thanks for your response! This will be used in Texas. When you say cheap but not too cheap do you mean like $50/$75 or over $100?A cheap (but not too cheap) pair of walkie-talkies could accomplish this. I have some that can send a tone, for instance. All you'd need to do is add a circuit to react to that tone. It's possible these walkie talkies light an LED when they're receiving a signal. If so, you could tap into that.
There are many other options. More details will get a better answer. Be aware that some radio options are prohibited by local laws. You should specify where you need this to work.
Correct. I was thinking of something like this:Thanks for your response! This will be used in Texas. When you say cheap but not too cheap do you mean like $50/$75 or over $100?
That's also what I was thinking, but I haven't seen a specific device that I know would work and the devil is always in the details. I'm sure you could rig something to identify a particular tone signal that the talkies can generate but I'm not sure there is a talkie that lights an LED in response to receiving a strong signal. Seems like there should be but I haven't seen one.So, if I get a set of walkie talkies that have an LED indicator light, I could potentially just take the wires off the LED and add them as part of the circuit?
See if this suits your needs:I'm looking to build a long distance (up to 425 meters) wireless remote transmitter and receiver. It needs to operate on battery power. I want to use the transmitter to open and close a circuit. How can I do this?
Well what do you know, I have one of those too. https://www.allaboutcircuits.com/projects/create-a-2-channel-remote-control-with-the-nrf24l01/Absolutely best solution here ought be Nordic NRF024L for about 1 USD per piece. Warranted clear field distance on FSK above 1000 meter, measured in city centre conditions about 500 meter.
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