OSK Keyer Module only Kit

Building Instructions

The OSK-1 Keyer is a feature rich low cost memory Keyer, offering features that you would expect from keyer’s much more expensive. The CW training mode is excellent and worth building the keyer just for this feature.

The Keyer is built around a small but powerful microcontroller. The code for the chip is open source from Jan DK3LJ who developed the original program, later modified by Jack AL4SV and then further modified by Don WD9DMP who made some changes that polished Jan's code even more .

The finial product rivals professional keyer’s costing many times the price.

This Keyer is not inteneded to be used with older Valve or Hybrid radio (See our Universal Keyer for that use)

This open source code is now installed onto a Attiny85 chip, It fits on a small PCB and can be built in less than an hour. 

The Features of this Keyer are :-

Iambic A, B, Ultimatic modes
DAH Priority Mode
Paddle Swapping
Sidetone Toggle
Adjustable Sidetone Pitch
ATU Tune Feature (20 Sec Key Down)
with one touch cancel
TX Keying Toggle (Sidetone only for practice)
TX Level Inverter mode
WPM Speed feedback
4 x 100 char Memory’s
Automatic Beacon (for FOX hunts extra)
Callsign CW Trainer
(Sends random callsign, users send back)