Building in part on the project in the previous post, check out this Iambic USB Keyboard that Trammell built for the N2YCR station at NYC Resistor. He writes:
Bill Ward (KD4ISF), Guy Dickenson (KD7TJJ) and Dave Clausen (W2VV) setup a club call sign N2YCR and a remotely operated computer station running fldigi for PSK31. The machine is in the backroom at NYCR and can be operated by members with general class amateur radio licenses from anywhere, using xvnc to display the fldigi application.
But operating it with a keyboard has none of the feel of an old fashioned QSO, so I designed an interface for Dave’s BY-1 Bencher Iambic Paddle. Iambic paddles are very different from straight keys in that they have two inputs: one for “dit” and one for “dah”. If an input is held in, it will repeat at a pre-programmed speed. If both are held in, they will alternate between the two symbols. Typically the dah is three time as long as the dit.
The paddle itself doesn’t generate the code; this is the responsibility of the radio, or in this case, of the Teensy 2.0. It runs a state machine that listens for PIND4 to be pulled low to indicate a dah, or PIND5 to be pulled low for a dit. If neither is pulled low within the time of two dits, the current bit-stream is looked up in a table and if there is a valid USB keyboard event in the table it will be sent to the host computer.
Check out his blog post for all the details, including design considerations and source code.
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Phil, here is a great guy to give a ham radio badge to. Not because he is a ham but because he built something for ham radio.