Retro computing and gaming, sci-fi books, tv and movies and other geeky stuff.

Home » Archive » net.micro.zx » Reply on how to drive leds
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Return to the default flat view Create a new topic Submit Reply
Reply on how to drive leds [message #128104] Fri, 11 October 2013 18:11
spangler is currently offline  spangler
Messages: 7
Registered: September 2013
Junior Member
Message-ID: <4868@brl-tgr.ARPA>
Date: Tue, 25-Sep-84 09:12:40 EDT
Article-I.D.: brl-tgr.4868
Posted: Tue Sep 25 09:12:40 1984
Date-Received: Sat, 29-Sep-84 09:56:26 EDT
Organization: Ballistics Research Lab
Lines: 9

 I have been expermenting with zx81's and find that using a 8255 I/O chip
is the best way for me. It has 24 I/O lines that  can drive a 5 volt logic
level, which can be used to drive leds, scr's, and triac's. 
 Besides using the 8255 you would need address decoders, which can be done
with a 74LS138 and a few other 74's. I have also tried voice interfacing
using the GE SP-0256 which seems to work well.     

[Message index]
Read Message
Previous Topic: Re: Disk Interface for ts-1000
Next Topic: How to drive LEDS
Goto Forum:

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Mon Oct 26 00:56:46 EDT 2020

Total time taken to generate the page: 0.00383 seconds