The Tworse Key is a standalone device that connects through a standard LAN cable, the Morse signals are decoded by the built-in Arduino Ethernet board, which delivers the final message though the Twitter API.
Morse Key (search on Ebay) Arduino Ethernet board (or alternatively an Arduino plus Ethernet shield)
piezo buzzer for auditory feedback
50 Ohm resistor to connect the buzzer
RGB LED (common anode) for visual feedback
10k Ohm resistor to connect the LED (reducing its brightness)
a RJ45 ethernet cable
9V Battery + connector (for internal use)
5V power supply (for external use)
USB FTDI cable to program the Arduino Ethernet board
a wooden box to mount the electronics and Morse key
various cables and soldering equipment
»Tone Tube« CW Code Practice Oscillator Code Practice Oscillator »Tone Tube« (TT). Made in Germany.
Palm Radio had several inquiries about a small tone generator in the past, so the »Tone Tube« has been developed recently...
Building the “Toothpick” Audio CW Filter “Toothpick” Audio CW Filter Kit
Variable bandpass helps peak desired signal
Audio amplifier will drive speaker to room filling volume
In / out switch
Use with phones or speaker
9A5AN’s Solid State CW Paddle Solid state 9A5AN's CW paddle is completely new product in the world of telegraphy keys. Innovative idea of detection finger presses to paddle lever(s) eliminates moving parts typical for mechanical keys.