# RF Module question

Status
Not open for further replies.

#### GonzoEngineer

##### New Member
Any of you guy's have experience using off the shelf RF Modules?

I need the ability to communicate from a boat to shore, no more than a quarter of a mile.

It is simple application, I just want to activate a winch that controls a boat rail. (A boat rail is just railroad tracks going underwater and conveying a platform for bringing the boat up on shore.

I can do all the control electronics for the winch.....just need ideas for an off the shelf rf transmitter that will work reliably at about 1/4 mile over water.

#### colin mac

##### New Member
I think that's too great a distance for off the shelf RF modules. 500 feet is more like it at least from what I've seen.

#### GonzoEngineer

##### New Member
Disregard........I found what i needed.

Last edited:

#### JimB

##### Super Moderator
Gonzo, one thing I feel I must add, you are controlling a piece of machinery via a radio link using what I assume will be a "free for all" frequency.

You need to ensure that none of the kiddy toys which vomit all over the RF spectrum can start the thing when you dont expect it.

Something a bit more rigorous than the presence of a signal is required to start the machine, and it should stop on failure of the control signal.

Just my 2 cents worth, (or should that be 2dB worth?).

JimB

#### Nigel Goodwin

##### Super Moderator
Gonzo, one thing I feel I must add, you are controlling a piece of machinery via a radio link using what I assume will be a "free for all" frequency.

You need to ensure that none of the kiddy toys which vomit all over the RF spectrum can start the thing when you dont expect it.

Something a bit more rigorous than the presence of a signal is required to start the machine, and it should stop on failure of the control signal.
He said it's a complete solution from Linx, so it will be Manchester coded, and use a specific ID - it won't simply rely on a signal or not.

#### GonzoEngineer

##### New Member
Gonzo, one thing I feel I must add, you are controlling a piece of machinery via a radio link using what I assume will be a "free for all" frequency.

You need to ensure that none of the kiddy toys which vomit all over the RF spectrum can start the thing when you dont expect it.

Something a bit more rigorous than the presence of a signal is required to start the machine, and it should stop on failure of the control signal.

Just my 2 cents worth, (or should that be 2dB worth?).

JimB
The Linx Technology stuff already takes that into consideration. No problem there.

I actually talked to one of their Engineers today, and he said the system will probably work to half a mile over water!

Last edited:
Status
Not open for further replies.