Radio Transmitters and Recievers (Information Resources)

Shortwave bands - Wikipedia, the free encyclopedia

The bands and frequencies below are derived from multiple sources, and different radios may have different frequency numbers. Most international broadcasters use amplitude modulation with 5-kHz steps between channels; a few use single sideband modulation.

 

Transmitters

Pira CZ 5W PLL FM Transmitter

This circuit is highly recommended for broadcasting the music the your christmas lights are synchronized with to  passers-by and spectators.

DIY FM transmitter project

100mW version of the Pira CZ above.  Pdf file contains all the details.

Finding the right antenna - DIYC forum question/answers provide three recommended designs. 1) How to make a dipole antenna 2) Design a J-Pole Antenna

 3) Slim Jim antenna

 

Recievers

Software Defined Radio - ELEKTOR.com

SD (software-defined) radio receivers use a bare minimum of hardware, relying instead on their software capabilities.

 

SDRadio, a Software Defined Radio

 

Elektor DSP Radio Scanner - ELEKTOR.com

PC based scanning software for the Elektor DSP radio.

 

The Elektor DSP radio - ELEKTOR.com

DSP world receiver with USB interface

 

SW Converter for Digital AM Car Radio - ELEKTOR.com

 

The ATM18 Radio Computer - ELEKTOR.com

Using the SI4735 DSP radio chip

 

G8JCFSDR - Home

The G8JCFSDR is an SDR which uses RF front-end hardware to down-convert RF frequencies into the 0~24KHz range accepted by most PC soundcards. The PC reads in the soundcard signal and carries out all of the filtering, demodulation, AGC, and notch filtering in software rather than hardware as would be the case in a traditional receiver

SI4735-C40-GU AM/FM Radio IC - Sparkfun

The Si4735-C40-GU is the first digital CMOS AM/FM radio receiver IC that integrates the complete tuner function from antenna input to audio output.

SI4735 AM & FM Receiver Shield - Sparkfun

Now that we've mounted it on a shield, you can harness all of that sweet radio-playing power right from your Arduino.

Arduino - HomePage

Shortwave Radio

This site is a collection point for information, construction techniques, theory, and enjoyment of Shortwave Listening.

Hi-fi Wireless Headset - ELEKTOR.com

Wireless headsets have been conspicuously absent from hobby electronics magazines.

Antennas

A  Magnetic Loop Antenna for Shortwave Listening (SWL)

Understanding Shortwave Radio Listening and Antenna Design and Construction

Wifi/Internet Radio

 

Projects - Open Circuits

Radio circuits as well as other electronic projects.

 

Building a Wifi Radio by Jeff Keyzer hacking an Asus WL-520GU wireless router.

Ongoing series at mightyOhm about building a low cost, open source streaming internet radio.

The Wifi Radio Project by Gary Dion

Inspired by Jeff Keyzer...

"...I'm one who often has the radio playing when I'm working on a project or unwinding at the end of the day. And while there are a few good radio stations still around, there are times I'd like to listen to a genre that a local station just doesn't cover. Ever since stations started simulcasting on the internet, I've been a big fan. You name it, and someone probably has a station dedicated to it. This page outlines my project to home-brew a dedicated box for 'tuning in' these online stations. Sure, I could have bought one for $100 or just used my computer (which I've often done, and still do), but I wanted to make something to match the other stereo hardware I have. I also like that I can personalize every aspect of the design, and put to use some of the hardware I've collected over the years..."

How To Make A Cheap WiFi Radio a video tutorial version from Tinkernut.

Elektor

Cylon Voice - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement

Programmer for DCC Model Railway Control - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement

Winamp Controller (090531-71) - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement

Digital Multi-Effects Unit - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement

Guitar Input for Multi-Effects Unit - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement

NetWorker - ELEKTOR.com | Electronics: Microcontrollers Embedded Audio Digital Analogue Test Measurement