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USB CW KEYER, WinKey based external CW Keyer
https://www.microham.com/contents/en-us/d22_CK.html
CW KEYER™is a powerful USB CW interface/memory keyer based on the K1EL chip and microKEYER. Provides the unmatched CW features of the original microKEYER™ and a USB radio control interface in a small, readily portable package …
The K3NG Arduino CW Keyer – Radio Artisan
https://blog.radioartisan.com/arduino-cw-keyer/
Main Features CW speed adjustable from 1 to 999 WPM Up to six selectable transmitter keying lines Programming and interfacing via USB port USB or PS2 Keyboard Interface for CW keyboard operation without a computer Logging and Contest Program Interfacing via K1EL Winkey 1.0 and 2.0 interface protocol emulation Command Line Interface
GitHub - softerhardware/CWKeyer: CW Keyer for Teensy 4.0
https://github.com/softerhardware/CWKeyer
The keyer is also a USB audio device. This allows for low latency CW sidetone to be mixed in with received audio from a Hermes-Lite 2.0 amateur softwareware defined radio or other radio. This project is currently a DIY project with instructions below for those who feel comfortable with some light soldering and Arduino programming. Hardware
A Few Good CW Keyers
https://ac0c.com/main/page_homebrew_a_few_good_cw_keyers.html
Author Chuck W5UXH built the keyer for use in high speed rag chew sessions (50+ WPM) that were beyond the capabilities of his paddle skill. Subsequent generations of the board have audio interface capabilities for use with the iCW (internet CW) enthusiasts. Chuck's build is lovely, encased in a clear plastic custom-built box.
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