0

March 9, 2015 AT 5:00 pm

Ham Radio Morse Code Keyer With Arduino

NewImage

James Harvey made an Arduino based iambic keyer. via wb8nbs

Richard Chapman KC4IFB published an article in the Sep/Oct 2009 QEX magazine (subscription required) for constructing an Iambic Keyer on the Arduino platform. I downloaded his code from the QEX web site (ARRL membership required) and found it worked well.  I have not been active in Ham Radio for years and my morse code is seriously rusty, so I decided to build a keyer for practice purposes and maybe to use on a real radio some day when I figure out how to get an antenna up on this small lot.  I have a WB4VVF Accu-Keyer I used with my homemade paddles long ago.  I bought the PC board from WB4VVF himself at the Dayton Hamvention.  Chapman’s keyer implementation on the Arduino Uno felt exactly the same and I had no problem getting used to it.

I wanted to see if this code would run on an ATtiny85 chip. These are beautiful little microcontrollers in an 8 pin DIP package. They have 8K of internal flash memory and with a minor bit of library downloading, are programmable via the Arduino IDE.  There is a catch though, tiny85 does not normally have bootloader code like a formal Arduino does so you need additional circuitry to burn your sketch onto the little chip. In July 2013 Jim Williams from Workshop 88 in Glen Ellyn conducted a class in tiny85 programming which I attended. At the end of the class we all had our own Arduino ISP adapter board and could burn a tiny85 by using an Arduino UNO as an intermediary.

I amped up my ISP adapter by adding a ZIF socket. It also can program the ATMega328 chips by moving five jumpers.

Read more


Check out all the Circuit Playground Episodes! Our new kid’s show and subscribe!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground”Adafruit’s Apps!


Maker Business — Lessons Learned Scaling Airbnb 100X

Wearables — Start with a sketch

Electronics — When do I use X10?

Biohacking — Project Peri – Translates Sound into Light for the Hearing Impaired

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.