Keyers

Easy Morse Code Keyer Circuit - based on the famous Curtis family of morse keyer chips and has a proven record of dependability.

Simple Electronic Keyer - A simple keyer which can be built for as little as $6 with some junk box parts. Although this circuit is not a true iambic keyer, it is capable of producing perfectly sounding CW.

Made your Iambic keyer - This iambic keyer uses a PIC16C84 or PIC16F84 microcontroller to generate the dot/dash timing and key the transmitter.

G4AXX Voice keyer Interface - This voice-keyer-interface connects between a Yaesu FT1000MP and a PC's sound card & COM port. It can be used as a voice-keyer with Contest Voice Blaster and as a voice-keyer and CW-keyer with Writelog.

CW keyer - The PIC-MORSE is an electronic iambic keyer, integrating a generator of Morse code and a sidetone. It is built with a microcontroller PIC16C711. In French

CW PIC keyer - CW keyer with microprocessor PIC16F628A

External Keypad for FT-817 - An external keypad for FT-817(ND), for the serious portable/field-day contester/operator. Homebrew it with the free firmware and public circuit diagram. The circuit is very simple and takes power supply from the ACC port of the radio

A low cost morse Trainer / Keyer - By Prof. T. K. Mani - VU2ITI

A Simple CW Keying Interface - Functional, easy, and cheap, all good Ham Radio characteristics by Terry Fletcher, WA0ITP

AVR Butterfly Keyer - The Atmel AVR Butterfly is a credit card sized board which contains an AVR MEGA169 processor, a six character LCD display, a five way joystick navigation switch, a piezo speaker, a 3 volt lithium battery cell for power and a few other odds and ends.

CMOS Super Keyer - Home made keyer with 8 memories, auto spacing, adjustable speed & weighting, separate paddle and key inputs, beacon mode, positive or negative keying, fuse, extremely low power requirements, and a bullet proof housing by AA5TB

CW K Pip Tone Unit - This is an add on for anyone who wants an automatic CW \"K\" PIP tone after each over.

CW keyer - The PIC-MORSE is an electronic iambic keyer, integrating a generator of Morse code and a sidetone. It is built with a microcontroller PIC16C711. In French

CW Keyer with WinKey emulation - A CW PIC based keyer [16F688] which can be used in WinKey emulation mode, works with CW software that supports WinKey, or use with any terminal type program. Hex code is FREE.

CW PIC keyer - CW keyer with microprocessor PIC16F628A

Easy Morse Code Keyer Circuit - based on the famous Curtis family of morse keyer chips and has a proven record of dependability.

Economical keyer - Using the PicoKeyer chip. Features a 60 character memory, setup & message entry using a paddle and no battery is required to retain the memory.

External Keypad for FT-817 - An external keypad for FT-817(ND), for the serious portable/field-day contester/operator. Homebrew it with the free firmware and public circuit diagram. The circuit is very simple and takes power supply from the ACC port of the radio

FM Morse Code Keyer - A simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency.

FT290 CW KOX Circuit - This is not actually break-in but just KOX circuit. It can only be used on the CW mode otherwise it keys up the Tx

G4AXX Voice keyer Interface - This voice-keyer-interface connects between a Yaesu FT1000MP and a PC's sound card & COM port. It can be used as a voice-keyer with Contest Voice Blaster and as a voice-keyer and CW-keyer with Writelog.

Iambic-Squeeze-Keyer - A home made iambic Squeeze electronic keyer

IK0WRB Keyer - IK0WRB CW Keyer using a PIC 16F84

K8RA P2 Iambic Key Review Priority listing - A short review of the K8RA P2 Iambic key, and a few pictures by W4INF

Logikey K-5 Review - Review of Logikey K-5 Keyer

M0KGK Keyer - The M0KGK keyer with variable speed and weight controls utilising a low cost PIC microcontroller.

Made your Iambic keyer - This iambic keyer uses a PIC16C84 or PIC16F84 microcontroller to generate the dot/dash timing and key the transmitter.

MicroBeacon - The MicroBeacon is the combination of a memory keyer and controllable RF attenuator.

Morse Code Speedometer - Morse code speedometer project using the 16F84 PIC

Morse Keyer Circuit - This is not a sophisticated automatic keyer but it is lot QRP to build and to have fun operatin

Notes on N1MM Voice Keyer - Setting up the N1MM Voice Keyer using the Ultimate Linking Interface (ULI)

Opto Coupler for Keying - Isolating traceiver and your computer with an opto-coupler component

PIC Keyer - The PIC Keyer is a full-featured Morse code keyer which has been programmed into a PIC 16F88 Microcontroller by W7GC

PIC-Keyer - This project describes the construction of a real CW QRP keyer with a small microcontrolle

QLF Filter - Microprocessor based interface designed receives a signal from a Morse key, processes it, and re-transmits it to the radio. A microprocessor in the circuit is pre-programmed with a proprietary algorithm which makes a number of measurements and adjustments to the less percise human generated code.

Simple CMOS elbug - It is a simple electronic keyer that proved to be reliable, precise timing and no own phantasy by OK1DX

Simple CW keyer - OH7SV ultimatic type keyer with Dit priority

Simple Electronic Keyer - A simple keyer which can be built for as little as $6 with some junk box parts. Although this circuit is not a true iambic keyer, it is capable of producing perfectly sounding CW.

The 68HC705 Beacon Keyer Projects - C8 based Keyer, This microcontroller-based beacon controller board was originally developed during March - September 1996 to become part of the then replacement P29 beacon

The Classic Micro TO Keyer - K8CU builds a classic 1967 QST semiconductor project during the 40th anniversary year of the original project publication.

Tone Keyer For Morse Code Programs - Key your transmitter from the tone output of a Morse Code generator program

Two PIC-Based Keyers - By Andy Palm N1KSN

Vocal Keyer - The Vocal Keyer is a stand-alone voice keyer for your radio. It can be built with two 16-second or four 10-second recordable messages by KG4JJH

Yaesu FT100 Contest Assistant - Yaesu FT100 Ham Voice Keyer in Italian

ZL2PD CMOS Keyer - Two cheap CMOS ICs and a few transistors was all that was required to rebuild an elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer.