Radio Frequency (RF) circuitry

This directory is for RF (Radio Frequency) related projects and documentation

Further subdirectories:

Antenna
Antenna projects and information
Equipment
RF Equipment information

Files in this directory:

electrx3.asc
How to make an fm transmitter and a touch activated switch.
fm-trans.doc
This is a simple FM wireless microphone designed by Paul Marxhausen of the University of Nebraska Engineering Electronics Shop.
phonebug.tar.Z
This device is a simple transmitter that is powered from the phone line and transmits in the upper portion of the FM broadcast band. It is basically an SMT version of kits offered by a number of kit retailers.
rfsniff.asc
RF Sniffer, operating from .5 to 500 MHz.
rfxmitter.tar
This file contains information about building a small radio transmitter, which has a PCB 1.75" x 2.5" (45mm x 68 mm) and has a range of about 30 yards or so. The documentation with the circuit says the freq range is 100-108 MHz, but I have found it to be more like 85-100 MHz.
transmit.zip
Small FM radio transmitter


If you have any questions about the Circuit Cookbook archive or these Web pages, please contact Dan Charrois.