Filed under: Data-Sheets
In order for this four digit display to work it must be compatible with the 4511 BCD chip. So it was important to identify, when purchasing the display, whether the chip works with a common anode or a common cathode display. The 4511 datasheet specified that the 4511 BCD is compatible with the common cathode display.
LED’s fall into two categories: Common Cathode, where all the 8 anode legs use only one cathode which is common and Common Anode where the common leg for all the cathode is of Anode type.
I intend to use this project board and the 18x picaxe to drive my four digit seven segment display. Using all eight outputs, I intend to use four of them to drive the 4511 BCD and the other four power the four individual digits. The benefit of using the PICAXE system is that programs are downloaded via a direct cable link straight into the microcontroller. I will program the picaxe with the use of programming editor, which can be downloaded from the picaxe web-site. Using the program language basic I intend to create a programme that will allow the time to be displayed.
