R2dev.fr
R&R Developpements

LED Matrix display

This is the first R2dev lab project.
We have a display composed of 7x95 LED dots.
This kind of display os very insterresting to give information like clock, temperature or various messages and animations.
The only problem : the command board of the matrix display is obsolete and dead. Our solution : design another one!

Board designed with :
- PIC 16F877 to manage all the operations
- a RTC (Real Time Clock) DS3232 to keep accurate clock even if not powered
- a temperature sensor (included in the DS3232)
- a UART link to program messages and update clock with a computer


Here is a picture presenting the new command board :




And a picture of the running display :



© R&R 2025