Need Help with Alphanumeric Displays
Gorilla
Posts: 16
I am using 14 segment alphanumeric displays they are common anode and I use 220 ohm resistors on each of the cathodes and the anodes are connected to npn transistors which are hooked up to 74hc595 shift register and to 5 volts. I plan to use two more 74HC595 shift registers to control the cathodes at a later time but I am not sure if this is possible.
14 Seg Display.bsp
I need a little help with writing the program, and maybe the circuit itself. I made a very crude schematic with MS Paint.
14 Seg Display.bsp
I need a little help with writing the program, and maybe the circuit itself. I made a very crude schematic with MS Paint.
Comments
You will need a LED driver chip. http://www.maxim-ic.com/datasheet/index.mvp/id/3410
http://www.maxim-ic.com/datasheet/index.mvp/id/3540 -- I2c compatible.