Introduction: Morse Code Generator for the 16x24 HT1632C LED Matrix- I Made It at TechShop

In this instructable I'll detail how to use the HT1642C LED Matrix from Adafruit to make a Morse code generator that both flashes a letter and plays a buzzer corresponding to the Morse code equivalent.

To make the box for the matrix, take a look at my previous instructable.

Here's a video demonstration the end result:

I made this project over at TechShop (

Step 1: Materials/tools

16x24 HT1632C LED Matrix
Wire/ hook-up wires
8-ohm speaker

Step 2: Wiring Everything Up

Next we need to hook everything up. Refer to the official instructions for wiring up the matrix, I used the same pins in this exercise as well. We'll also need to connect a speaker to pin 8. That's all we need so connect it to a computer and get ready for some programming!

Step 3: Upload the Program

You'll need to download the official library here and put it in the correct folder in your Arduino directory to continue.

The code's really long so I won't paste the whole thing here, I've attached it as a file to download and plug into Arduino. I uploaded two variations: one that plays the alphabet sequentially and another that cycles random letters. The code's a ton of copy/paste and isn't too complicated, but if anyone has any specific questions I'll be happy to answer them in the comments.

And that's all she wrote! There's a video of it in action in the intro of the instructable. Thanks for reading!


pepetito (author)2013-05-27

what would be cool if you had a morse code remote that you press the the letter on it and it flashes an infrared led that is aimed at a reciever connected to an arduino and the arduino converts it to letters and displays it on a matrix

erica1988 (author)2013-05-23

Beautiful, I like.
I f you want chip crack, touch me.

erica1988 (author)2013-05-23

Beautiful, I like!

eXtremeSomething (author)2013-05-23

Morse Code and letters at the same time, this man is a genius!!! Redundancy ftw.

About This Instructable




More by khietman:Morse code generator for the 16x24 HT1632C LED Matrix- I made it at TechShopMaking a box for your 16x24 HT1632C LED Matrix- I made it at TechShopControl Arduino functions with a USB controller, no soldering required- I made it at TechShop
Add instructable to: