433 MHZ RF Circuit Design with PIC 12F683

[Jeffh5]

Hello

I am new to the forums and working on a RF Project. I want to send a 4 Character code from a 8 pin 12F683 PIC to a 433MHZ wireless transmitter. Then on the other end i have the 433MHZ receiver that goes to another microcontroller. Almost like RFID. I send a code every about 3 seconds then have the second microcontoler which is a basic stamp for now read the code and do a compassion and run some leds.

Where i need help from the forum is building the Code sender. I bought a few 8 pin 12F683 pics and a Pickit 2 for programing. I have been using PBacis to program my basic stamp so im planning on using PICBASIC to program my pic. A very simple serout program in an infinite loop with a 2 second pause i think. I am looking for suggestions on the best way to accomplish this. As well as info on program and writing the code. My basic stamp is a homework board and was programed with a serial cable. I have never programed pic on a breadboard but want to learn.

[dhouston]

I send a code every about 3 seconds...If you are in the USA, FCC Part 15 rules limit such unsupervised transmissions to 2 seconds per hour (http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&sid=e1097e06a81393af40e4d497f1916e7a&rgn=div8&view=text&node=47:1.0.1.1.15.3.240.21&idno=47).

[Jeffh5]

The date on that page shows Oct 6th? is tha a brand new law? Is there any other way to do it?

[pyrogeek]

you cant send data on 433, unless it follows a control signal. And dhouston is correct, you basically cant have automated signals, if its automated then 2 second per hour total transmit time. your better off moving to a higher band.

[dhouston]

The date on that page shows Oct 6th? is tha a brand new law? Is there any other way to do it?No, that's been the rule for quite some time. The date just reflects the latest update to what is a rather lengthy document.

You need to use a frequency that allows more frequent transmissions.