So this is my approach of an LED clock. There are zillions of LED clocks out there. Mine is some kind of retro and minimalistic version. It consists of
- AVR ATmega8, 8 Kb, 4.096 MHz
- Everlight 2.3″, LED Matrix, 8×5 LEDs
- some resistors, capacitors and a quarz
- optional serial connection for configuration
The LED matrix is used in landscape mode, that means it uses a very tiny font. Most characters fit in 3×5 pixels. The font supports only uppercase characters. Because the display has only 8 columns the message has to scrolled.
The display has the following features at the moment:
- Displays a greeting message
- Displays the current time, hh:mm:ss
- Displays a custom message
- Messages and current time can be modified via serial port
Here is the schematic of the LED clock. The Everlight 5*8 Dot Matrix was not available as part of the Eagle libraries, so I build the part on my own. It looks a bit clumsy as it is my first try to design components.
Here is a video of the LED Clock. You can see how it changes through different modes from telling the time to displaying a greetings message.
I’m mucking around with an LED matrix at the moment myself. I’m a bit stuck on the scrolling though, I can make it scroll one character at a time but it starts at the left hand side, so looks crap. Any possibility of seeing your code? In return, I’ve got an eagle part library for an 8×8 matrix that I’m sure you could alter to a 8×5 easily…
just add more spaces to your string, that should help with the scrolling. The source is unfinished and as always without any warranty.
Anyway, here you go …
may you give me your eagle file for the dot matrix thing? i have a 7×5 one here but no files it anywhere. altering yours would save me a lot of time. =)
mh, just now i found a similar useful one: http://www.sensi.org/~svo/eagle/
let me correct myself: not as useful as yours would be.. :)
the part has not been used in a PCB until now so I will not release something untested. It was my first part and it was a bit crappy. I think I will remake it.
I’m sorry, I still don’t understand how to change the clock and messege via serial port. can you give the program or how to change them? And if i add more led matrix, which code should I change?I’m so intersting with this project. My plan is make this project for gift to my girl. can you help me? thanks before.
BTW, what happened to this project Alex? Never finished?
I often get stuck in prototyping ;)
Your device is really amazing, im very suprised.
Is it possible to send me the bit fuse and the hex file of the device ?
It were very nice of you..
I don’t have any of the files any more, but as I remember, there were nothing special about the fuses.
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