Hi, For my new mod I want to have digit number on top of all of my hard drive (5 of them) displaying the used % of each drive. My electronic knowledge is not that big, so I need help. I have a programmer background, assembly included, so I can code chips, even if I never did so. I can also make my circuit board in acid, weld, design circuit using some EDA software and with some work, well, understand what I am doing. That's it, it's about all I can do right now. That's not quite enough to do that project, I have no idea how to start, atmega, pic, picaxe? And how to handle 10 digit from 1 port? I think I will need one master chip and 10 slave, but that mean using one wire to call 7 signal (one for each digit led), so how can it be done? Binary, different voltage, telegraph like algo? I really don't know where to start all this. The more coding and less electronic would be the best solution for me, but I know it will take quite a lot of electronic work. I would like to use USB, USB-serial or the DB-9 serial port to communicate, but audio or parallel can work too if it is simpler. I understand the scale of this project, and how much knowledge I miss to complete it, but I will do it anyway. http://www.bond-led.com/pic/led-digit-display-02.JPG I will be using Linux, FreeBSD or Solaris to control the led (embedded ARM based system), but I can write the driver, it's just matter of I/O binary after all.