LED flower vase supplementary note.

Some of the viewers requested for the source codes and also the circuit diagram, kaas is no longer working on his blog, so let me write you all a supplementary note.

Of course, I don't own a circuit diagram, but I can draw you all a block diagram:


Remember, it is only a draft block diagram, power and resistors are not shown in this diagram, please try to add your own:)

The complete working source codes: Download Now (Only tested compilation on Mac OS X with avr-gcc).

Send me your led vase's photo if you successfully made one:) Have fun!

Small 5x7 Dot Matrix LED display

What is 5x7 dot matrix display?


5x7 dot matrix Led display is usually used to cascade together to make a large led matrix display as you see in train station.


(A typical LED matrix display)

The small size of 5x7 dot matrix led display is good for small electronic project, typically the 5x7 dot matrix is used to display one character a time, i.e. 5x7 dot matrix font. In order to use only one 5x7 dot matrix to display information, we have to use the 5x7 dot matrix horizontally. We use the 5x4 dot matrix font instead and of course text scrolling will be necessary.

The KAAS Led flower vase is using the 5x7 dot matrix display for displaying messages.

kaas used one AVR tiny13 and two 74hc595 chips to drive the led matrix, the result is very impressive. The detail information of the LED flower vase is here.

Another interesting project is the Twitter LED scroller Build from davidnin. He used the Arduino board and one 74HC595 to drive the 5x7 dot matrix led. Please check out the cool video:

Another project from us, GIF2LED!
it allows you to convert a gif animation to LED header file to speed up your coding time:)

Check it out:
http://www.bitartist.org/2008/06/gif2led-released-and-with-my-led-egg.html


Another cool tiny message scroller using ATtiny2313 from kalanda:

http://www.kalanda.com/scroller-de-7x5-leds-basado-en-micro-attiny2313.html

Red Led Bubble From the 70s.

I found this special Red led bubble in ebay by (powerandlight).
It looks so cool to me. I didn't see this led before, I found out that it should be similar to one used in TI-59 or other old calculators in the year 1977. It was not in production anyway.
Each bubble can display A-Z and 0-9. It should be the same as 15 segment LEDs nowadays. I hope it can be larger otherwise it is so small to use as a cool display.

Jeroen used the AVR ATtiny2313 with 74HC595 to drive this cool red bubble, as he called "Starburst Led" project: