Driving LED matrix with AVR on glass board

2D matrix on glass

Driving LED matrix is one part of the story. Everyone basically can do this. But how about circuit on the glass. This may take time and some effort. Andrew found this area interesting and started building 2D matrix on the glass driven by Atmega1284. The circuit seemed easy enough to trace on a single sided board. To make traces he used copper tape which seems to be pretty robust thing to use. Just cut and stick to the glass. To make things faster, Andrew drew circuit and PCB layout with eagle, this way he only had to copy the layout. After copper layout was done, he simply coated traces with solder and soldered the components. Of course it takes time, but end result looks really great. Continue reading

Simple Tutorial on interfacing 5×7 dot matrix display with AVR

Dot matrix displays are common display types in electronics. They are used where simple pseudo-graphics information need to be indicated.  Controlling dot matrix display is quite easy because it is nothing more than LED array. Anyway there are some points to keep in mind to make things easier. In this project you will find out how to connect 5×7 dot matrix displays to AVR microcontroller and display information by scanning lines at some frequency – as you know these works dynamically to fool your eyes. Simple code snippet will give some starting point. Continue reading