NNTP-Posting-Date: Sun, 17 Nov 2002 21:37:52 -0600
From: "David Jones"
Subject: Re: I need an 8 to 256 decoder or equivalent
Date: Sun, 17 Nov 2002 22:33:35 -0500
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
thanks for the help. I don't want to bother you though. I just need to go
back and do a ton of studying before I do much else. I've been doing just
that but there is so much to learn. I just don't know how to implement my
idea using available ic's.
"Gary Tait" wrote in message
> On Fri, 15 Nov 2002 22:54:56 -0500, "David Jones"
> >I'm trying to use an 8 bit binary input to select 1 of 256 different
> >LEDS(I'm using leds as an example). I know there exists a 4bit input 16
> >output decoder but I don't know how to get 256 options using it with
> >IC's. How do I make the equivalent of an 8 to 256 decoder with the least
> >discete components? any suggestions are welcome.
> Now reading all your posts, it seems you want to have at least 8 lines
> on your paralell port (or even some sort of serial signal), turn on
> and off up to 256 loads (for your agument LEDs, but could be anything.
> If you don't want to do serial (using a micro will make it easy,
> electronically, the code for the chip, and to send commands to the
> chip will take work), you could use a multitude of latches and address
> decoders select an address, and latch data to that address. It will be
> much simpler, IMO. I can supply you with base schematics you can add