
John Park at Make has a really nice introduction to 7-segment LED displays and reverse engineering. He maps the relationship between bits in a byte and each LED segment connected to an SAA106 driver. This is a real-world introduction to the tedious art of poking at hardware to reverse engineer a circuit.

I want to use 7 segment display to display voltages from 0 to 5V range with upto 2 decimal places using pic controller.
can any one help me how to write the C code for the display..
Regards
Adnan
Hi. If the purpsoe of your project isn’t to learn how to program a pic you will find some cheap 7 segment panel meters on ebay very cheap.
If have a couple of them and they are quite precise.
If it´s a project to learn programming you might wanna check out arduino.cc, of course this is another hardware but you will find a lot of example code.
Bo :o)