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KiwiSDR is a software-defined radio (SDR) covering shortwave, the longwave & AM broadcast bands, various utility stations, and amateur radio transmissions, world-wide, in the spectrum from 10 kHz to 30 MHz. The KiwiSDR is a custom circuit board (cape) you connect to the BeagleBone GreenorBeagleBone Black computer. You simply add an antenna, power supply and network connection. The KiwiSDR is available in two versions: the cape alone and a more complete version including BBG, enclosure and GPS antenna. Both versions include software supplied on a micro-SD card.

An HTML5-capable browser and internet connection will let you listen to a public KiwiSDR anywhere in the world. Up to four people can listen simultaneously to one radio — each listener tunes independently.

Try it right now! Listen to KiwiSDR registered on the sdr.huwebsite.

Features

• 100% Open Source / Open Hardware.

• Browser-based interface allowing four simultaneous user web connections.

• Each connection tunes an independent receiver channel over the entire spectrum.

• Waterfall tunes independently of audio and includes zooming and panning.

• Multi-channel, parallel DDC design using bit-width optimized CIC filters.

• Good performance at VLF/LF since we personally spend time monitoring those frequencies.

• Automatic frequency calibration via received GPS timing.

• Easy hardware and software setup. Browser-based configuration interface.

• Extension interface for adding decoders and utilities.

Specification

• SDR covers the 10 kHz to 30 MHz (VLF-HF) spectrum.

• Web interface based on OpenWebRX from András Retzler, HA7ILM.

• Demodulation modes: AM, AMN, LSB, USB, CW, CWN, NBFM.

• Extensions at present: WSPR viewer/decoder, IQ display, Loran-C      viewer.

• RF antenna connector: SMA and terminal block.

• Integrated software-defined GPS receiver from Andrew Holme's Homemade GPS Receiver.

• GPS receives the Navstar system on L1 frequency 1575.42 MHz.

• GPS antenna connector: SMA, 3.3V powered for active antennas.

• Voltage: +5V DC, 2.1mm jack, center pin positive.

• Current: 1.5A including Beagle, KiwiSDR powers Beagle through header connectors.

• Dimensions: KiwiSDR PCB 117mm * 55mm, SMA connectors additional.

Part List

• 1 x KiwiSDR Board

• 1 x Beaglebone Green

• 1 x Unassembled enclosure

• 1 x Skyworks SE4150L GPS front-end antenna

• 1 x Micro-SD Card

Documents

• For source code and issues list, please visit our Githubpage.

• For technical discussion, please come to our Forum.

• For projects that you would like to share with the community, please visit Recipe.