Post by thread:[OT] How to send PIC data a short distance by radi

I need to send a short serial message over a distance of about 100 meters by radio. The message is only generated a few times an hour in response to a real-world event. Neither speed mor "life or death" accuracy is an issue. I am hoping someone can suggest an inexpensive "off the shelf" hardware for this. This is a USA application, and avoiding licensing hassles would be a big plus. Thanks, Foster Brashear

Foster Check out the RF moduals at http://www.linxtechnologies.com Scott adastra wrote: {Quote hidden}> I need to send a short serial message over a distance of about 100 meters by > radio. > The message is only generated a few times an hour in response to a > real-world event. > Neither speed mor "life or death" accuracy is an issue. > I am hoping someone can suggest an inexpensive "off the shelf" hardware for > this. > This is a USA application, and avoiding licensing hassles would be a big > plus. > Thanks, > Foster Brashear

This address does not work. Something wrong with it? -----Original Message----- From: Jinx <spam_OUTjoecolquittTakeThisOuTCLEAR.NET.NZ> To: .....PICLISTKILLspam@spam@MITVMA.MIT.EDU <PICLISTKILLspamMITVMA.MIT.EDU> Date: Friday, November 19, 1999 1:30 AM Subject: Re: [OT] How to send PIC data a short distance by radio? >Plenty of short-medium range FM transmitters/receivers to build at > >http://sm0vpo.com/index.htm > >as well as a lot of other useful info. > >Jinx > >

Sorry for previous bad address, missed a bit out in the middle. Dave's Homebrew page for small radio transmitters and receivers (and other gadgets) to build is actually http://sm0vpo.8m.com/index.htm worth a look. Jinx > I need to send a short serial message over a distance of about 100 meters by > radio. > Foster Brashear >

I checked out this guys page. I'm not much up on analog/RF stuff and can't see me using any of these circuits to have a couple of PICs exchange data. Is there anything simpler that can be constructed at home? The other alternative would be to buy and Rx/Tx module set. But if size is a concern....... John Mullan {Original Message removed}

I don't think you're going to find anything much simpler for a tunable transmitter, maybe a one-transistor job, but if you have the ability to make that, you'd be able to make a slightly more complex one. As far as the receiver goes, you could always buy a cheap pocket radio off the shelf for next to nothing. I'm sure you could get a FM Radio Microphone kit from an electronics retailer. Our local (NZ, Dick Smith Electronics) has a simple, reliable, stable transmitter that's well worth the money ($24.95). I've made up a few with no problems. When over-driven with pulses rather than voice they'll do 100m easily. Jinx {Quote hidden}> Is there anything simpler that can be constructed at home? The other > alternative would be to buy and Rx/Tx module set. > > John Mullan > > Homebrew page for small radio transmitters and > > http://sm0vpo.8m.com/index.htm > > worth a look. > > > I need to send a short serial message over a distance of about 100 meters

How about this... http://www.microchip.com search for: DD0097 Section: SimpleCircuitT Description: PICmicro¨ Digital PCM Radio Transmitter Date: 4/22/98 Documentation: MP097.pdf (21 K) -=[ Michael Kristensen ]=[ .....mkeKILLspam.....nospam.dk ]=-