8 replies to this topic

[hari]

When I saw this post, I thought it would be cool to write an app that goes the opposite direction. Instead of blinking out morse code, the app would "look" at the morse code, measure the pulse and pause widths and convert them back into words.

Looking at the blinking LED was easy, but converting that back into morse code was more difficult than I expected. I will not share how I did it here, just in case you want to try the challenge yourself. However, my code is attached to this post if you're interested in seeing how I solved the problem.

http://www.youtube.com/watch?v=V2ZPYs7jHKs

Part 1: Staring at the LED

http://www.youtube.com/watch?v=9RuwKBmQxvg

Part 2:Interpreting the blinks

Thanks to N2MOH for the morse sender (I also copied your timing constants) and Scott Hanselman for the morse array.

Attached Files

•  MorseReceiver.zip   12.4KB   413 downloads

[Chris Walker]

Wow, hari. That's pretty fantastic. I love it! I see that you're using a Netduino Plus for the "morse code encoder/sender" unit. Now I'm thinking of making an app which takes text messages and/or e-mails and translates them into morse code That would be awesome and hillarious. Chris

[Eric Burdo]

Now I'm thinking of making an app which takes text messages and/or e-mails and translates them into morse code That would be awesome and hillarious.

If you ever want a good book to read... The Cuckoo's Egg - http://en.wikipedia.org/wiki/The_Cuckoo's_Egg_(book)

Great book about computer hacking in the mid 80's.

Anyhow... Cliff Stoll (guy in the book) wrote some code to have the computers call his pager when certain events happened... and the page gave out morse code to alert Cliff of the specifics. Kinda neat for something from the 80's (pre-text messaging, email devices, etc).

[hari]

Wow, hari. That's pretty fantastic. I love it!

Thanks Chris.

I see that you're using a Netduino Plus for the "morse code encoder/sender" unit. Now I'm thinking of making an app which takes text messages and/or e-mails and translates them into morse code That would be awesome and hillarious.

I don't want to hog all the fun. Go for it!

[bill.french]

if you've never seen this video, it's mildly entertaining -- Morse Code vs. Text Messaging:

[Chris Walker]

if you've never seen this video, it's mildly entertaining -- Morse Code vs. Text Messaging:

Man, they are _quick_.

[hari]

if you've never seen this video, it's mildly entertaining -- Morse Code vs. Text Messaging:

No, never seen that before, thx for sharing.

[dm3281]

When I saw this post, I thought it would be cool to write an app that goes the opposite direction. Instead of blinking out morse code, the app would "look" at the morse code, measure the pulse and pause widths and convert them back into words.

Looking at the blinking LED was easy, but converting that back into morse code was more difficult than I expected. I will not share how I did it here, just in case you want to try the challenge yourself. However, my code is attached to this post if you're interested in seeing how I solved the problem.

http://www.youtube.com/watch?v=V2ZPYs7jHKs

Part 1: Staring at the LED

http://www.youtube.com/watch?v=9RuwKBmQxvg

Part 2:Interpreting the blinks

Thanks to N2MOH for the morse sender (I also copied your timing constants) and Scott Hanselman for the morse array.

What kind of styro foam are you using to hold your netduino? I need something like that.

Also, can you publish your diagram?

[hari]

What kind of styro foam are you using to hold your netduino? I need something like that.

Also, can you publish your diagram?

In the U.S. it's called Foam Board. Here's the exact product that I bought at my local Staples office store.
I just love this material, for only $12 you get three huge sheets. I've created many projects and still have one sheet left over.

Here is the blog post on the Morse Code Decoder. Let me know if you have any questions.