The DFR – just briefly.

Update: a feature article on the DFR was published in the November 2015 QST  – check it out!

It’s been a while since I have made a blog post, but I have been busy with a number of building projects. The first of these to complete was the DFR – the Digital Fist Recorder. This device is built from an Arduino with software I wrote to record and play back Morse code messages sent with a hand key. The recordings preserve the exact timing of the pulses, and so record the sender’s “fist” or distinctive sending style.

The idea for this project was suggested to me by the ham who sold me the Vibroplex bug I described in the previous post.

I have a full article in the works, but for now here is a short video demonstrating the DFR in action

Here’s a photo of the interior, showing the Arduino stack on the left, and the keying circuit, a commercial kit called a KeyAll that uses FETs that can handle high voltage and either polarity keying.

DFR-N2HTT-Photo-B-interior

There will be more details on this to follow.

73,
de N2HTT

Advertisements
This entry was posted in Arduino, Ham Radio and tagged , , , , , . Bookmark the permalink.

3 Responses to The DFR – just briefly.

  1. Pingback: Definitely not a tube project. | 73, de N2HTT

  2. Mike, thanks for making public this great project for straight key enthusiasts! Works, looks good and is fun to use. 73, Wolf, KB1BMF

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s