The IQ Keyer Project

Welcome to the IQ Keyer project page. This is an Arduino based device for generating Morse code using:

    • a straight key
    • a CW paddle
    • text to CW from a computer via USB

In addition to conventional keying output designed to drive the CW input on commercial or home-brew transceivers, the IQ Keyer provides quadrature audio sinewave outputs designed to drive the audio I and Q inputs  of Software Defined Radios (SDR) like the HobbyPCB RS-HFIQ or the Five Dash Softrock RXTX Ensemble. Unlike generating CW using a computer and sound card to drive the SDR, the IQ Keyer can use traditional CW keying hardware and produce zero-latency CW using a SDR.

The IQ Keyer Kit is now available at the HobbyPCB website.

Click here for a video tour of the inside of the IQ Keyer.

The IQ Keyer Block Diagram