Pavel, There are numerous LED driving ICs around. An oldie but a goodie is the MM545X family which drives about 32 segments (40 pin dip) and has large current drive capability, segment current control, doesn't need segment resistors and has a very simple 2 wire serial interface which can be easily driven from a PIC or whatever. For over 32 segments you can use more of these :-) or could multiplex them under software control.This makes the PIC a little busier but is still easy enough to do. Using one segment per MM545X output the operation is fully static with no software overhead once the data is output. Russell McMahon -----Original Message----- From: Caisson To: PICLIST@MITVMA.MIT.EDU Date: Wednesday, 18 August 1999 22:25 Subject: Re: Decoder for 16 segment LEDs ? >> Van: Pavel Korensky < > >> Aan: PICLIST@MITVMA.MIT.EDU >> Onderwerp: Decoder for 16 segment LEDs ? >> Datum: dinsdag 17 augustus 1999 13:22 >> >> Hello, >> >> I need to build the multiplexed alphanumeric LED display with 10 digits. >I >> will use 16 segment LED with common anode. I would like to ask you, if >you >> have any idea if there is some simple 16 segment decoder chip available >> (like 74LS247 for 7 segment) ? >> If no, I will need to use bigger PIC :-((( > >Hello Pavel, I suspect you will be multiplexing the 10 display's ... You >could multiplex your segments as 2*8 too ... with 1-to-2 decoders, or >simply by two bus-drivers ... > >Greetz, > Rudy Wieser >