then its too much hard work bro..... its not simple as it looks ..... if u try to handle the LED matrix through the microcontrollers ..... the programming will drive you nuts..... its pretty complex stuff.... seriously....
can be made with much lesser effort .... here is what u need to do.... u'll have to learn microcontrollers .... and for that u''l have to learn either one of these languages to program the controller .... either learn Assembly programming or C .... i think C is easier ... bcz if u program the microcontroller using C then u wont have to learn much abt the hardware of the microcontroller .... just a bsic knowledge will do .... now choose a microcontroller .... the simplest would be learning abt 8051 .... grab a book abt 8051 ..... the best book i recommend is "The 8051 Microcontroller and Embedded Systems: by Muhammad Ali Mazidi" .... and now study chapters explaining LED interfacing and Serial Communication (bcz i suppose u would control the 7 segments through a computer program) and thats it .... its pretty easy .... will take around 2 weeks if know nothing abt electronics .... if u do u could make it in like 4 days may be ...... dont koose hope .... try
the above idea is how i will solve the requested problem .... there may be other ways to solve the same problem....