RF Rain Detector Circuit Help

[leo_098]

Hi Guys.

Im currently working on a university project which requires using a simple circuit to detect water and use it in a consumer product. We have chosen a rain detector as there aint too many options available with the device we have which is:

http://www.maplin.co.uk/water-alarm-22564

Basically, we want to connect this to a RF transmitter and receiver so when the rain detector is activated it sends the signal to a key ring carried around by the user. The RF Transmitter & receiver are:

http://www.maplin.co.uk/rf-transmitter-receiver-and-transceiver-modules-267236

Can anyone help me with connecting the circuit with the transmitters please.

Also, I noticed this product what does it do?

http://www.maplin.co.uk/rf-modem-modules-267317?ordercode=A65JN

Many Thanks

Liam

 

[BobK]

The radio modules are not what you want. They would require a microcontroller on each side to operate and are serious overkill for what you are doing. I am not sure where to look for a simple on / off radio transmitter and receiver that is what you need.

Bob

 

[TBennettcc]

Try looking into the 1-Wire protocol with Zigbee / X-Bee:

http://en.wikipedia.org/wiki/1-Wire

http://www.maxim-ic.com/products/1-wire/

http://en.wikipedia.org/wiki/Zigbee

http://en.wikipedia.org/wiki/XBee

http://en.wikipedia.org/wiki/Digi_International

A buddy of mine in college used these radios to build a sensor network. I think this is close to what he was working on:

http://www.trossenrobotics.com/p/Xbee-Communication-Starter-Kit.aspx

I'm not sure how much programming was actually involved, as I was working on a separate project at the time. Good luck with your project.